Refactor Pickle Read methods to use higher performance PickleIterator.

content/common/child_process_sandbox_support_impl_linux.cc

Index: content/common/child_process_sandbox_support_impl_linux.cc
diff --git a/content/common/child_process_sandbox_support_impl_linux.cc b/content/common/child_process_sandbox_support_impl_linux.cc
index 9040cd055c904b2a180fab4e2521df89f29b691b..4ce8eaa33a48c50c2c98052146728a21b4c00df4 100644
--- a/content/common/child_process_sandbox_support_impl_linux.cc
+++ b/content/common/child_process_sandbox_support_impl_linux.cc
@@ -36,7 +36,7 @@ void GetFontFamilyForCharacters(const uint16_t* utf16,
   bool isItalic = false;
   if (n != -1) {
     Pickle reply(reinterpret_cast<char*>(buf), n);
-    void* pickle_iter = NULL;
+    PickleReader pickle_iter(reply);
     if (reply.ReadString(&pickle_iter, &family_name) &&
         reply.ReadBool(&pickle_iter, &isBold) &&
         reply.ReadBool(&pickle_iter, &isItalic)) {
@@ -64,7 +64,7 @@ void GetRenderStyleForStrike(const char* family, int sizeAndStyle,
   }
 
   Pickle reply(reinterpret_cast<char*>(buf), n);
-  void* pickle_iter = NULL;
+  PickleReader pickle_iter(reply);
   int useBitmaps, useAutoHint, useHinting, hintStyle, useAntiAlias, useSubpixel;
   if (reply.ReadInt(&pickle_iter, &useBitmaps) &&
       reply.ReadInt(&pickle_iter, &useAutoHint) &&