Fix all the code which has duplicate variable declarations

When there are duplicate variable declarations, the inner names shadow the
outter ones. This is error prone and harder to read. Remove all the
instances found by /analyze.

BUG=chromium:613623, chromium:427616

Review-Url: https://codereview.chromium.org/2027273002

1 files changed, 43 insertions, 64 deletions

diff --git a/core/fxge/dib/fx_dib_composite.cpp b/core/fxge/dib/fx_dib_composite.cpp
index 282b93d6da..28f6e49044 100644
--- a/core/fxge/dib/fx_dib_composite.cpp
+++ b/core/fxge/dib/fx_dib_composite.cpp
@@ -2512,11 +2512,10 @@ void CompositeRow_ByteMask2Argb(uint8_t* dest_scan,
     int alpha_ratio = src_alpha * 255 / dest_alpha;
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      RGB_Blend(blend_type, scan, dest_scan, blended_colors);
       *dest_scan =
           FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], alpha_ratio);
       dest_scan++;
@@ -2583,11 +2582,10 @@ void CompositeRow_ByteMask2Rgba(uint8_t* dest_scan,
     int alpha_ratio = src_alpha * 255 / dest_alpha;
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      RGB_Blend(blend_type, scan, dest_scan, blended_colors);
       *dest_scan =
           FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], alpha_ratio);
       dest_scan++;
@@ -2644,11 +2642,10 @@ void CompositeRow_ByteMask2Rgb(uint8_t* dest_scan,
     }
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      RGB_Blend(blend_type, scan, dest_scan, blended_colors);
       *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], src_alpha);
       dest_scan++;
       *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[1], src_alpha);
@@ -2791,11 +2788,10 @@ void CompositeRow_BitMask2Argb(uint8_t* dest_scan,
     int alpha_ratio = src_alpha * 255 / dest_alpha;
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      RGB_Blend(blend_type, scan, dest_scan, blended_colors);
       *dest_scan =
           FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], alpha_ratio);
       dest_scan++;
@@ -2866,11 +2862,10 @@ void CompositeRow_BitMask2Rgb(uint8_t* dest_scan,
     }
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      RGB_Blend(blend_type, src_scan, dest_scan, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      RGB_Blend(blend_type, scan, dest_scan, blended_colors);
       *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[0], src_alpha);
       dest_scan++;
       *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, blended_colors[1], src_alpha);
@@ -3584,15 +3579,11 @@ void CompositeRow_ByteMask2Argb_RgbByteOrder(uint8_t* dest_scan,
     int alpha_ratio = src_alpha * 255 / dest_alpha;
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      uint8_t dest_scan_o[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      dest_scan_o[0] = dest_scan[2];
-      dest_scan_o[1] = dest_scan[1];
-      dest_scan_o[2] = dest_scan[0];
-      RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      uint8_t dest_scan_o[3] = {dest_scan[2], dest_scan[1], dest_scan[0]};
+      RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
       dest_scan[2] =
           FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], alpha_ratio);
       dest_scan[1] =
@@ -3641,15 +3632,11 @@ void CompositeRow_ByteMask2Rgb_RgbByteOrder(uint8_t* dest_scan,
     }
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      uint8_t dest_scan_o[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      dest_scan_o[0] = dest_scan[2];
-      dest_scan_o[1] = dest_scan[1];
-      dest_scan_o[2] = dest_scan[0];
-      RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      uint8_t dest_scan_o[3] = {dest_scan[2], dest_scan[1], dest_scan[0]};
+      RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
       dest_scan[2] =
           FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], src_alpha);
       dest_scan[1] =
@@ -3715,15 +3702,11 @@ void CompositeRow_BitMask2Argb_RgbByteOrder(uint8_t* dest_scan,
     int alpha_ratio = src_alpha * 255 / dest_alpha;
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      uint8_t dest_scan_o[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      dest_scan_o[0] = dest_scan[2];
-      dest_scan_o[1] = dest_scan[1];
-      dest_scan_o[2] = dest_scan[0];
-      RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      uint8_t dest_scan_o[3] = {dest_scan[2], dest_scan[1], dest_scan[0]};
+      RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
       dest_scan[2] =
           FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], alpha_ratio);
       dest_scan[1] =
@@ -3788,15 +3771,11 @@ void CompositeRow_BitMask2Rgb_RgbByteOrder(uint8_t* dest_scan,
     }
     if (blend_type >= FXDIB_BLEND_NONSEPARABLE) {
       int blended_colors[3];
-      uint8_t src_scan[3];
-      uint8_t dest_scan_o[3];
-      src_scan[0] = src_b;
-      src_scan[1] = src_g;
-      src_scan[2] = src_r;
-      dest_scan_o[0] = dest_scan[2];
-      dest_scan_o[1] = dest_scan[1];
-      dest_scan_o[2] = dest_scan[0];
-      RGB_Blend(blend_type, src_scan, dest_scan_o, blended_colors);
+      uint8_t scan[3] = {static_cast<uint8_t>(src_b),
+                         static_cast<uint8_t>(src_g),
+                         static_cast<uint8_t>(src_r)};
+      uint8_t dest_scan_o[3] = {dest_scan[2], dest_scan[1], dest_scan[0]};
+      RGB_Blend(blend_type, scan, dest_scan_o, blended_colors);
       dest_scan[2] =
           FXDIB_ALPHA_MERGE(dest_scan[2], blended_colors[0], src_alpha);
       dest_scan[1] =
@@ -4710,7 +4689,7 @@ FX_BOOL CFX_DIBitmap::CompositeRect(int left,
     ASSERT(!IsCmykImage() && (uint8_t)(alpha_flag >> 8) == 0);
     int left_shift = rect.left % 8;
     int right_shift = rect.right % 8;
-    int width = rect.right / 8 - rect.left / 8;
+    int new_width = rect.right / 8 - rect.left / 8;
     int index = 0;
     if (m_pPalette) {
       for (int i = 0; i < 2; i++) {
@@ -4726,8 +4705,8 @@ FX_BOOL CFX_DIBitmap::CompositeRect(int left,
       uint8_t* dest_scan_top_r = (uint8_t*)GetScanline(row) + rect.right / 8;
       uint8_t left_flag = *dest_scan_top & (255 << (8 - left_shift));
       uint8_t right_flag = *dest_scan_top_r & (255 >> right_shift);
-      if (width) {
-        FXSYS_memset(dest_scan_top + 1, index ? 255 : 0, width - 1);
+      if (new_width) {
+        FXSYS_memset(dest_scan_top + 1, index ? 255 : 0, new_width - 1);
         if (!index) {
           *dest_scan_top &= left_flag;
           *dest_scan_top_r &= right_flag;