Refactor Pickle Read methods to use higher performance PickleIterator.

content/common/resource_dispatcher.cc

Index: content/common/resource_dispatcher.cc
diff --git a/content/common/resource_dispatcher.cc b/content/common/resource_dispatcher.cc
index e824c6f0bc61b1ebd5ae4f39515b933f89cae8a4..8a1d76c37cbfe1c4fcc8c7503aa6d5d09bb0e088 100644
--- a/content/common/resource_dispatcher.cc
+++ b/content/common/resource_dispatcher.cc
@@ -293,7 +293,7 @@ bool ResourceDispatcher::OnMessageReceived(const IPC::Message& message) {
 
   int request_id;
 
-  void* iter = NULL;
+  PickleReader iter(message);
   if (!message.ReadInt(&iter, &request_id)) {
     NOTREACHED() << "malformed resource message";
     return true;
@@ -677,7 +677,7 @@ bool ResourceDispatcher::IsResourceDispatcherMessage(
 // static
 void ResourceDispatcher::ReleaseResourcesInDataMessage(
     const IPC::Message& message) {
-  void* iter = NULL;
+  PickleReader iter(message);
   int request_id;
   if (!message.ReadInt(&iter, &request_id)) {
     NOTREACHED() << "malformed resource message";