Merge to XFA: Fix a bunch of -Wunused-but-set-variable warnings.

Also fix a few nits and other errors along the way.

Review URL: https://codereview.chromium.org/1098583002
Review URL: https://codereview.chromium.org/1135713004

(cherry picked from commit f0a169e6fd5718995fa6ef8749c8d16cdad84985)
(cherry picked from commit 470408c2ffe71e99cebad0d1d6887f1723f02cef)

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1133453006

2 files changed, 38 insertions, 53 deletions

diff --git a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
index 3b0490f3c6..3546f574f9 100644
--- a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
@@ -351,25 +351,24 @@ void color_sycc_to_rgb(opj_image_t *img)
 }
 void color_apply_icc_profile(opj_image_t *image)
 {
-    cmsHPROFILE in_prof, out_prof;
-    cmsHTRANSFORM transform;
-    cmsColorSpaceSignature in_space, out_space;
-    cmsUInt32Number intent, in_type, out_type, nr_samples;
-    int *r, *g, *b;
-    int prec, i, max, max_w, max_h;
-    OPJ_COLOR_SPACE oldspace;
-    in_prof =
+    cmsHPROFILE out_prof;
+    cmsUInt32Number in_type;
+    cmsUInt32Number out_type;
+    int *r;
+    int *g;
+    int *b;
+    int max;
+    cmsHPROFILE in_prof =
         cmsOpenProfileFromMem(image->icc_profile_buf, image->icc_profile_len);
     if(in_prof == NULL) {
         return;
     }
-    in_space = cmsGetPCS(in_prof);
-    out_space = cmsGetColorSpace(in_prof);
-    intent = cmsGetHeaderRenderingIntent(in_prof);
-    max_w = (int)image->comps[0].w;
-    max_h = (int)image->comps[0].h;
-    prec = (int)image->comps[0].prec;
-    oldspace = image->color_space;
+    cmsColorSpaceSignature out_space = cmsGetColorSpace(in_prof);
+    cmsUInt32Number intent = cmsGetHeaderRenderingIntent(in_prof);
+    int max_w = (int)image->comps[0].w;
+    int max_h = (int)image->comps[0].h;
+    int prec = (int)image->comps[0].prec;
+    OPJ_COLOR_SPACE oldspace = image->color_space;
     if(out_space == cmsSigRgbData) {
         if( prec <= 8 ) {
             in_type = TYPE_RGB_8;
@@ -398,8 +397,8 @@ void color_apply_icc_profile(opj_image_t *image)
     } else {
         return;
     }
-    transform = cmsCreateTransform(in_prof, in_type,
-                                   out_prof, out_type, intent, 0);
+    cmsHTRANSFORM transform =
+        cmsCreateTransform(in_prof, in_type, out_prof, out_type, intent, 0);
     cmsCloseProfile(in_prof);
     cmsCloseProfile(out_prof);
     if(transform == NULL) {
@@ -410,13 +409,13 @@ void color_apply_icc_profile(opj_image_t *image)
         if( prec <= 8 ) {
             unsigned char *inbuf, *outbuf, *in, *out;
             max = max_w * max_h;
-            nr_samples = (cmsUInt32Number)max * 3 * (cmsUInt32Number)sizeof(unsigned char);
+            cmsUInt32Number nr_samples = max * 3 * sizeof(unsigned char);
             in = inbuf = FX_Alloc(unsigned char, nr_samples);
             out = outbuf = FX_Alloc(unsigned char, nr_samples);
             r = image->comps[0].data;
             g = image->comps[1].data;
             b = image->comps[2].data;
-            for(i = 0; i < max; ++i) {
+            for(int i = 0; i < max; ++i) {
                 *in++ = (unsigned char) * r++;
                 *in++ = (unsigned char) * g++;
                 *in++ = (unsigned char) * b++;
@@ -425,7 +424,7 @@ void color_apply_icc_profile(opj_image_t *image)
             r = image->comps[0].data;
             g = image->comps[1].data;
             b = image->comps[2].data;
-            for(i = 0; i < max; ++i) {
+            for(int i = 0; i < max; ++i) {
                 *r++ = (int) * out++;
                 *g++ = (int) * out++;
                 *b++ = (int) * out++;
@@ -435,13 +434,13 @@ void color_apply_icc_profile(opj_image_t *image)
         } else {
             unsigned short *inbuf, *outbuf, *in, *out;
             max = max_w * max_h;
-            nr_samples = (cmsUInt32Number)max * 3 * (cmsUInt32Number)sizeof(unsigned short);
+            cmsUInt32Number nr_samples = max * 3 * sizeof(unsigned short);
             in = inbuf = FX_Alloc(unsigned short, nr_samples);
             out = outbuf = FX_Alloc(unsigned short, nr_samples);
             r = image->comps[0].data;
             g = image->comps[1].data;
             b = image->comps[2].data;
-            for(i = 0; i < max; ++i) {
+            for(int i = 0; i < max; ++i) {
                 *in++ = (unsigned short) * r++;
                 *in++ = (unsigned short) * g++;
                 *in++ = (unsigned short) * b++;
@@ -450,7 +449,7 @@ void color_apply_icc_profile(opj_image_t *image)
             r = image->comps[0].data;
             g = image->comps[1].data;
             b = image->comps[2].data;
-            for(i = 0; i < max; ++i) {
+            for(int i = 0; i < max; ++i) {
                 *r++ = (int) * out++;
                 *g++ = (int) * out++;
                 *b++ = (int) * out++;
@@ -461,7 +460,8 @@ void color_apply_icc_profile(opj_image_t *image)
     } else {
         unsigned char *in, *inbuf, *out, *outbuf;
         max = max_w * max_h;
-        nr_samples = (cmsUInt32Number)max * 3 * sizeof(unsigned char);
+        cmsUInt32Number nr_samples =
+            (cmsUInt32Number)max * 3 * sizeof(unsigned char);
         in = inbuf = FX_Alloc(unsigned char, nr_samples);
         out = outbuf = FX_Alloc(unsigned char, nr_samples);
         image->comps = (opj_image_comp_t*)
@@ -477,14 +477,14 @@ void color_apply_icc_profile(opj_image_t *image)
         FXSYS_memset8(image->comps[2].data, 0, sizeof(int) * (size_t)max);
         image->numcomps += 2;
         r = image->comps[0].data;
-        for(i = 0; i < max; ++i) {
+        for(int i = 0; i < max; ++i) {
             *in++ = (unsigned char) * r++;
         }
         cmsDoTransform(transform, inbuf, outbuf, (cmsUInt32Number)max);
         r = image->comps[0].data;
         g = image->comps[1].data;
         b = image->comps[2].data;
-        for(i = 0; i < max; ++i) {
+        for(int i = 0; i < max; ++i) {
             *r++ = (int) * out++;
             *g++ = (int) * out++;
             *b++ = (int) * out++;
@@ -508,14 +508,12 @@ void color_apply_conversion(opj_image_t *image)
         int *L, *a, *b, *red, *green, *blue, *src0, *src1, *src2;
         double rl, ol, ra, oa, rb, ob, prec0, prec1, prec2;
         double minL, maxL, mina, maxa, minb, maxb;
-        unsigned int default_type, il;
-        unsigned int i, max, illu;
+        unsigned int default_type;
+        unsigned int i, max;
         cmsHPROFILE in, out;
         cmsHTRANSFORM transform;
         cmsUInt16Number RGB[3];
         cmsCIELab Lab;
-        illu = 0;
-        il = 0;
         in = cmsCreateLab4Profile(NULL);
         out = cmsCreate_sRGBProfile();
         transform =
@@ -706,10 +704,7 @@ void CJPX_Decoder::GetInfo(FX_DWORD& width, FX_DWORD& height, FX_DWORD& codestre
 }
 FX_BOOL CJPX_Decoder::Decode(FX_LPBYTE dest_buf, int pitch, FX_BOOL bTranslateColor, FX_LPBYTE offsets)
 {
-    FX_BYTE** channel_bufs;
-    int* adjust_comps;
     int i, wid, hei, row, col, channel, src;
-    FX_BOOL flag;
     FX_LPBYTE pChannel, pScanline, pPixel;
 
     if(image->comps[0].w != image->x1 || image->comps[0].h != image->y1) {
@@ -719,16 +714,15 @@ FX_BOOL CJPX_Decoder::Decode(FX_LPBYTE dest_buf, int pitch, FX_BOOL bTranslateCo
         return FALSE;
     }
     FXSYS_memset8(dest_buf, 0xff, image->y1 * pitch);
-    channel_bufs = FX_Alloc(FX_BYTE*, image->numcomps);
+    FX_BYTE** channel_bufs = FX_Alloc(FX_BYTE*, image->numcomps);
     if (channel_bufs == NULL) {
         return FALSE;
     }
-    adjust_comps = FX_Alloc(int, image->numcomps);
+    FX_BOOL result = FALSE;
+    int* adjust_comps = FX_Alloc(int, image->numcomps);
     if (adjust_comps == NULL) {
-        FX_Free(channel_bufs);
-        return FALSE;
+        goto done;
     }
-    flag = TRUE;
     for (i = 0; i < (int)image->numcomps; i ++) {
         channel_bufs[i] = dest_buf + offsets[i];
         adjust_comps[i] = image->comps[i].prec - 8;
@@ -736,8 +730,7 @@ FX_BOOL CJPX_Decoder::Decode(FX_LPBYTE dest_buf, int pitch, FX_BOOL bTranslateCo
             if(image->comps[i].dx != image->comps[i - 1].dx
                     || image->comps[i].dy != image->comps[i - 1].dy
                     || image->comps[i].prec != image->comps[i - 1].prec) {
-                flag = FALSE;
-                goto failed;
+                goto done;
             }
         }
     }
@@ -784,14 +777,12 @@ FX_BOOL CJPX_Decoder::Decode(FX_LPBYTE dest_buf, int pitch, FX_BOOL bTranslateCo
             }
         }
     }
+    result = TRUE;
 
+done:
     FX_Free(channel_bufs);
     FX_Free(adjust_comps);
-    return TRUE;
-failed:
-    FX_Free(channel_bufs);
-    FX_Free(adjust_comps);
-    return FALSE;
+    return result;
 }
 void initialize_transition_table();
 void initialize_significance_luts();
diff --git a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
index 53faab4a46..a5928f9ea3 100644
--- a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
@@ -888,7 +888,7 @@ CJBig2_Image *CJBig2_GRDProc::decode_Arith_Template3_opt2(CJBig2_ArithDecoder *p
     CJBig2_Image *GBREG;
     FX_DWORD line1;
     FX_BYTE *pLine, cVal;
-    FX_INTPTR nStride, nStride2;
+    FX_INTPTR nStride;
     FX_INT32 nBits, k;
     LTP = 0;
     JBIG2_ALLOC(GBREG, CJBig2_Image(GBW, GBH));
@@ -899,7 +899,6 @@ CJBig2_Image *CJBig2_GRDProc::decode_Arith_Template3_opt2(CJBig2_ArithDecoder *p
     }
     pLine = GBREG->m_pData;
     nStride = GBREG->m_nStride;
-    nStride2 = nStride << 1;
     for(FX_DWORD h = 0; h < GBH; h++) {
         if(TPGDON) {
             SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
@@ -2335,7 +2334,7 @@ CJBig2_SymbolDict *CJBig2_SDDProc::decode_Arith(CJBig2_ArithDecoder *pArithDecod
     CJBig2_Image **SDNEWSYMS;
     FX_DWORD HCHEIGHT, NSYMSDECODED;
     FX_INT32 HCDH;
-    FX_DWORD SYMWIDTH, TOTWIDTH, HCFIRSTSYM;
+    FX_DWORD SYMWIDTH, TOTWIDTH;
     FX_INT32 DW;
     CJBig2_Image *BS;
     FX_DWORD I, J, REFAGGNINST;
@@ -2345,7 +2344,6 @@ CJBig2_SymbolDict *CJBig2_SDDProc::decode_Arith(CJBig2_ArithDecoder *pArithDecod
     FX_DWORD EXRUNLENGTH;
     FX_INT32 nVal;
     FX_DWORD nTmp;
-    FX_BOOL SBHUFF;
     FX_DWORD SBNUMSYMS;
     FX_BYTE SBSYMCODELEN;
     FX_DWORD IDI;
@@ -2394,7 +2392,6 @@ CJBig2_SymbolDict *CJBig2_SDDProc::decode_Arith(CJBig2_ArithDecoder *pArithDecod
         }
         SYMWIDTH = 0;
         TOTWIDTH = 0;
-        HCFIRSTSYM = NSYMSDECODED;
         for(;;) {
             nVal = IADW->decode(pArithDecoder, &DW);
             if(nVal == JBIG2_OOB) {
@@ -2537,7 +2534,6 @@ CJBig2_SymbolDict *CJBig2_SDDProc::decode_Arith(CJBig2_ArithDecoder *pArithDecod
                     delete SBHUFFRSIZE;
                     delete pDecoder;
                 } else if(REFAGGNINST == 1) {
-                    SBHUFF = SDHUFF;
                     SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
                     if(IAID->decode(pArithDecoder, (int*)&IDI) == -1) {
                         m_pModule->JBig2_Error("symbol dictionary decoding procedure (arith): too short.");
@@ -2686,7 +2682,6 @@ CJBig2_SymbolDict *CJBig2_SDDProc::decode_Huffman(CJBig2_BitStream *pStream,
     FX_DWORD EXRUNLENGTH;
     FX_INT32 nVal, nBits;
     FX_DWORD nTmp;
-    FX_BOOL SBHUFF;
     FX_DWORD SBNUMSYMS;
     FX_BYTE SBSYMCODELEN;
     JBig2HuffmanCode *SBSYMCODES;
@@ -2843,7 +2838,6 @@ CJBig2_SymbolDict *CJBig2_SDDProc::decode_Huffman(CJBig2_BitStream *pStream,
                     delete SBHUFFRSIZE;
                     delete pDecoder;
                 } else if(REFAGGNINST == 1) {
-                    SBHUFF = SDHUFF;
                     SBNUMSYMS = SDNUMINSYMS + SDNUMNEWSYMS;
                     nTmp = 1;
                     while((FX_DWORD)(1 << nTmp) < SBNUMSYMS) {