Refactor Pickle Read methods to use higher performance PickleIterator.

ipc/ipc_tests.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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(OS_POSIX)
 #include <sys/types.h>
@@ skipping 122 matching lines @@
 TEST_F(IPCChannelTest, BasicMessageTest) {
   int v1 = 10;
   std::string v2("foobar");
   std::wstring v3(L"hello world");
 
   IPC::Message m(0, 1, IPC::Message::PRIORITY_NORMAL);
   EXPECT_TRUE(m.WriteInt(v1));
   EXPECT_TRUE(m.WriteString(v2));
   EXPECT_TRUE(m.WriteWString(v3));
 
-  void* iter = NULL;
+  PickleIterator iter(m);
 
   int vi;
   std::string vs;
   std::wstring vw;
 
   EXPECT_TRUE(m.ReadInt(&iter, &vi));
   EXPECT_EQ(v1, vi);
 
   EXPECT_TRUE(m.ReadString(&iter, &vs));
   EXPECT_EQ(v2, vs);
@@ skipping 425 matching lines @@
 #endif  // PERFORMANCE_TEST
 
 int main(int argc, char** argv) {
 #ifdef PERFORMANCE_TEST
   int retval = base::PerfTestSuite(argc, argv).Run();
 #else
   int retval = base::TestSuite(argc, argv).Run();
 #endif
   return retval;
 }