Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/common/extensions/extension_messages.h

Index: chrome/common/extensions/extension_messages.h
diff --git a/chrome/common/extensions/extension_messages.h b/chrome/common/extensions/extension_messages.h
index e45d67723d909bd5d8be3ddde0ba8239f6376145..276020ec8ab9679c15117da9ebf6ee3f651a8eb7 100644
--- a/chrome/common/extensions/extension_messages.h
+++ b/chrome/common/extensions/extension_messages.h
@@ -128,7 +128,7 @@ template <>
 struct ParamTraits<URLPattern> {
   typedef URLPattern param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, void** iter, param_type* p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };
 
@@ -136,7 +136,7 @@ template <>
 struct ParamTraits<URLPatternSet> {
   typedef URLPatternSet param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, void** iter, param_type* p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };
 
@@ -144,7 +144,7 @@ template <>
 struct ParamTraits<ExtensionAPIPermission::ID> {
   typedef ExtensionAPIPermission::ID param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, void** iter, param_type* p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };
 
@@ -152,7 +152,7 @@ template <>
 struct ParamTraits<ExtensionMsg_Loaded_Params> {
   typedef ExtensionMsg_Loaded_Params param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, void** iter, param_type* p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };