Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/browser/visitedlink/visitedlink_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <cstdio>
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/message_loop.h"
@@ skipping 508 matching lines @@
   virtual void WidgetRestored() OVERRIDE { widgets_++; }
   virtual void WidgetHidden() OVERRIDE { widgets_--; }
   virtual int VisibleWidgetCount() const OVERRIDE { return widgets_; }
 
   virtual bool Send(IPC::Message* msg) OVERRIDE {
     VisitCountingProfile* counting_profile =
         static_cast<VisitCountingProfile*>(
             Profile::FromBrowserContext(GetBrowserContext()));
 
     if (msg->type() == ChromeViewMsg_VisitedLink_Add::ID) {
-      void* iter = NULL;
+      PickleIterator iter(*msg);
       std::vector<uint64> fingerprints;
       CHECK(IPC::ReadParam(msg, &iter, &fingerprints));
       counting_profile->CountAddEvent(fingerprints.size());
     } else if (msg->type() == ChromeViewMsg_VisitedLink_Reset::ID) {
       counting_profile->CountResetEvent();
     }
 
     delete msg;
     return true;
   }
@@ skipping 169 matching lines @@
   EXPECT_EQ(1, profile()->add_event_count());
   EXPECT_EQ(0, profile()->reset_event_count());
 
   // Activate the tab.
   rvh()->WasRestored();
 
   // We should have only one more reset event.
   EXPECT_EQ(1, profile()->add_event_count());
   EXPECT_EQ(1, profile()->reset_event_count());
 }