Fix shadowed variables

This CL fixes instances of variable shadowing that are
discovered by turning on -Wshadow.

BUG=pdfium:1137

Change-Id: I418d50de89ecbeb12e85b23a358bc61e8f16e888
Reviewed-on: https://pdfium-review.googlesource.com/41150
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>

2 files changed, 32 insertions, 28 deletions

diff --git a/core/fxge/android/cfpf_skiafontmgr.cpp b/core/fxge/android/cfpf_skiafontmgr.cpp
index f9afdabb93..2288a86e92 100644
--- a/core/fxge/android/cfpf_skiafontmgr.cpp
+++ b/core/fxge/android/cfpf_skiafontmgr.cpp
@@ -252,9 +252,9 @@ CFPF_SkiaFont* CFPF_SkiaFontMgr::CreateFont(const ByteStringView& bsFamilyname,
                                             uint8_t uCharset,
                                             uint32_t dwStyle) {
   uint32_t dwHash = FPF_SKIAGetFamilyHash(bsFamilyname, dwStyle, uCharset);
-  auto it = m_FamilyFonts.find(dwHash);
-  if (it != m_FamilyFonts.end())
-    return it->second.get();
+  auto family_iter = m_FamilyFonts.find(dwHash);
+  if (family_iter != m_FamilyFonts.end())
+    return family_iter->second.get();
 
   uint32_t dwFaceName = FPF_SKIANormalizeFontName(bsFamilyname);
   uint32_t dwSubst = FPF_SkiaGetSubstFont(dwFaceName, g_SkiaFontmap,
@@ -273,8 +273,9 @@ CFPF_SkiaFont* CFPF_SkiaFontMgr::CreateFont(const ByteStringView& bsFamilyname,
   const CFPF_SkiaPathFont* pBestFont = nullptr;
   int32_t nMax = -1;
   int32_t nGlyphNum = 0;
-  for (auto it = m_FontFaces.rbegin(); it != m_FontFaces.rend(); ++it) {
-    const CFPF_SkiaPathFont* pFont = it->get();
+  for (auto face_iter = m_FontFaces.rbegin(); face_iter != m_FontFaces.rend();
+       ++face_iter) {
+    const CFPF_SkiaPathFont* pFont = face_iter->get();
     if (!(pFont->charsets() & FPF_SkiaGetCharset(uCharset)))
       continue;
     int32_t nFind = 0;
@@ -301,19 +302,19 @@ CFPF_SkiaFont* CFPF_SkiaFontMgr::CreateFont(const ByteStringView& bsFamilyname,
     if (uCharset == FX_CHARSET_Default || bMaybeSymbol) {
       if (nFind > nMax && bMatchedName) {
         nMax = nFind;
-        pBestFont = it->get();
+        pBestFont = face_iter->get();
       }
     } else if (FPF_SkiaIsCJK(uCharset)) {
       if (bMatchedName || pFont->glyph_num() > nGlyphNum) {
-        pBestFont = it->get();
+        pBestFont = face_iter->get();
         nGlyphNum = pFont->glyph_num();
       }
     } else if (nFind > nMax) {
       nMax = nFind;
-      pBestFont = it->get();
+      pBestFont = face_iter->get();
     }
     if (nExpectVal <= nFind) {
-      pBestFont = it->get();
+      pBestFont = face_iter->get();
       break;
     }
   }
diff --git a/core/fxge/cfx_fontmapper.cpp b/core/fxge/cfx_fontmapper.cpp
index c7a7015680..461094d81e 100644
--- a/core/fxge/cfx_fontmapper.cpp
+++ b/core/fxge/cfx_fontmapper.cpp
@@ -149,6 +149,14 @@ const AltFontFamily g_AltFontFamilies[] = {
     {"ForteMT", "Forte"},
 };
 
+#if _FX_PLATFORM_ == _FX_PLATFORM_LINUX_
+const char kNarrowFamily[] = "LiberationSansNarrow";
+#elif _FX_PLATFORM_ == _FX_PLATFORM_ANDROID_
+const char kNarrowFamily[] = "RobotoCondensed";
+#else
+const char kNarrowFamily[] = "ArialNarrow";
+#endif  // _FX_PLATFORM_ == _FX_PLATFORM_LINUX_
+
 ByteString TT_NormalizeName(const char* family) {
   ByteString norm(family);
   norm.Remove(' ');
@@ -415,14 +423,16 @@ FXFT_Face CFX_FontMapper::FindSubstFont(const ByteString& name,
   ByteString style;
   bool bHasComma = false;
   bool bHasHyphen = false;
-  auto pos = SubstName.Find(",", 0);
-  if (pos.has_value()) {
-    family = SubstName.Left(pos.value());
-    PDF_GetStandardFontName(&family);
-    style = SubstName.Right(SubstName.GetLength() - (pos.value() + 1));
-    bHasComma = true;
-  } else {
-    family = SubstName;
+  {
+    Optional<size_t> pos = SubstName.Find(",", 0);
+    if (pos.has_value()) {
+      family = SubstName.Left(pos.value());
+      PDF_GetStandardFontName(&family);
+      style = SubstName.Right(SubstName.GetLength() - (pos.value() + 1));
+      bHasComma = true;
+    } else {
+      family = SubstName;
+    }
   }
   for (; iBaseFont < 12; iBaseFont++) {
     if (family == ByteStringView(g_Base14FontNames[iBaseFont]))
@@ -443,7 +453,7 @@ FXFT_Face CFX_FontMapper::FindSubstFont(const ByteString& name,
   } else {
     iBaseFont = kNumStandardFonts;
     if (!bHasComma) {
-      pos = family.ReverseFind('-');
+      Optional<size_t> pos = family.ReverseFind('-');
       if (pos.has_value()) {
         style = family.Right(family.GetLength() - (pos.value() + 1));
         family = family.Left(pos.value());
@@ -540,19 +550,12 @@ FXFT_Face CFX_FontMapper::FindSubstFont(const ByteString& name,
         bItalic = italic_angle != 0;
         weight = old_weight;
       }
-#if _FX_PLATFORM_ == _FX_PLATFORM_LINUX_
-      const char* narrow_family = "LiberationSansNarrow";
-#elif _FX_PLATFORM_ == _FX_PLATFORM_ANDROID_
-      const char* narrow_family = "RobotoCondensed";
-#else
-      const char* narrow_family = "ArialNarrow";
-#endif  // _FX_PLATFORM_ == _FX_PLATFORM_LINUX_
-      auto pos = SubstName.Find("Narrow");
+      Optional<size_t> pos = SubstName.Find("Narrow");
       if (pos.has_value() && pos.value() != 0)
-        family = narrow_family;
+        family = kNarrowFamily;
       pos = SubstName.Find("Condensed");
       if (pos.has_value() && pos.value() != 0)
-        family = narrow_family;
+        family = kNarrowFamily;
     } else {
       pSubstFont->m_bSubstCJK = true;
       if (nStyle)