Use a direct include of the message_loop header in content/, part 3.

content/common/gpu/media/rendering_helper_gl.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 "content/common/gpu/media/rendering_helper.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/strings/stringize_macros.h"
 #include "base/synchronization/waitable_event.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_context_stub.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
 
 #if !defined(OS_WIN) && defined(ARCH_CPU_X86_FAMILY)
 #define GL_VARIANT_GLX 1
@@ skipping 475 matching lines @@
     CHECK(XUnmapWindow(x_display_, x_windows_[i]));
     CHECK(XDestroyWindow(x_display_, x_windows_[i]));
   }
   // Mimic newly created object.
   x_display_ = NULL;
   x_windows_.clear();
 #endif
 }
 
 }  // namespace content