IPC: Fix size_t to int cast for Win64 build.

ipc/ipc_perftests.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"
 
 #include <algorithm>
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 215 matching lines @@
   // Set up IPC channel and start client.
   PerformanceChannelListener listener;
   CreateChannel(&listener);
   listener.Init(channel());
   ASSERT_TRUE(ConnectChannel());
   ASSERT_TRUE(StartClient());
 
   // Test several sizes. We use 12^N for message size, and limit the message
   // count to keep the test duration reasonable.
   const size_t kMsgSize[5] = {12, 144, 1728, 20736, 248832};
-  const size_t kMessageCount[5] = {50000, 50000, 50000, 12000, 1000};
+  const int kMessageCount[5] = {50000, 50000, 50000, 12000, 1000};
 
   for (size_t i = 0; i < 5; i++) {
     listener.SetTestParams(kMessageCount[i], kMsgSize[i]);
 
     // This initial message will kick-start the ping-pong of messages.
     IPC::Message* message =
         new IPC::Message(0, 2, IPC::Message::PRIORITY_NORMAL);
     message->WriteInt64(base::TimeTicks::Now().ToInternalValue());
     message->WriteInt(-1);
     message->WriteString("hello");
@@ skipping 22 matching lines @@
                        IPC::Channel::MODE_CLIENT,
                        &listener);
   listener.Init(&channel);
   CHECK(channel.Connect());
 
   base::MessageLoop::current()->Run();
   return 0;
 }
 
 }  // namespace