Removes MessageLoop::TYPE_XXX where possible

chrome/renderer/media/chrome_webrtc_log_message_delegate_unittest.cc

 // Copyright 2013 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 <string>
 
 #include "base/process/process_handle.h"
 #include "chrome/common/partial_circular_buffer.h"
 #include "chrome/renderer/media/chrome_webrtc_log_message_delegate.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(ChromeWebRtcLogMessageDelegateTest, Basic) {
   const uint32 kTestLogSize = 1024;  // 1 KB
   const char kTestString[] = "abcdefghijklmnopqrstuvwxyz";
 
-  base::MessageLoop message_loop(base::MessageLoop::TYPE_IO);
+  base::MessageLoopForIO message_loop;
 
   scoped_ptr<ChromeWebRtcLogMessageDelegate> log_message_delegate(
       new ChromeWebRtcLogMessageDelegate(message_loop.message_loop_proxy(),
                                          NULL));
 
   base::SharedMemory shared_memory;
   ASSERT_TRUE(shared_memory.CreateAndMapAnonymous(kTestLogSize));
   base::SharedMemoryHandle new_handle;
   ASSERT_TRUE(shared_memory.ShareToProcess(base::GetCurrentProcessHandle(),
                                            &new_handle));
@@ skipping 19 matching lines @@
   char read_buffer[kExpectedSize * 2] = {0};
 
   uint32 read = read_pcb.Read(read_buffer, kExpectedSize * 2);
   EXPECT_EQ(kExpectedSize, read);
   std::string ref_output = kTestString;
   ref_output.append("\n");
   ref_output.append(kTestString);
   ref_output.append("\n");
   EXPECT_STREQ(ref_output.c_str(), read_buffer);
 }