Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/test/automation/automation_proxy.cc

Index: chrome/test/automation/automation_proxy.cc
diff --git a/chrome/test/automation/automation_proxy.cc b/chrome/test/automation/automation_proxy.cc
index fdfc5eb9aa2e29501fc11c071a158d612f7d6997..0760051118afb32ab188e18b3d433fdf0f2adb1e 100644
--- a/chrome/test/automation/automation_proxy.cc
+++ b/chrome/test/automation/automation_proxy.cc
@@ -79,7 +79,7 @@ class AutomationMessageFilter : public IPC::ChannelProxy::MessageFilter {
 
   void OnAutomationHello(const IPC::Message& hello_message) {
     std::string server_version;
-    void* iter = NULL;
+    PickleReader iter(hello_message);
     if (!hello_message.ReadString(&iter, &server_version)) {
       // We got an AutomationMsg_Hello from an old automation provider
       // that doesn't send version info. Leave server_version as an empty
@@ -462,7 +462,7 @@ bool AutomationProxy::Send(IPC::Message* message, int timeout_ms) {
 }
 
 void AutomationProxy::InvalidateHandle(const IPC::Message& message) {
-  void* iter = NULL;
+  PickleReader iter(message);
   int handle;
 
   if (message.ReadInt(&iter, &handle)) {