Cleanup: Remove unneeded browser_thread.h includes in contents.

content/browser/renderer_host/compositing_iosurface_mac.mm

 // 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/browser/renderer_host/compositing_iosurface_mac.h"
 
 #include <OpenGL/OpenGL.h>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "base/threading/platform_thread.h"
 #include "content/common/content_constants_internal.h"
-#include "content/public/browser/browser_thread.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/gl/gpu_switching_manager.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/surface/io_surface_support_mac.h"
 
 #ifdef NDEBUG
@@ skipping 822 matching lines @@
   glDeleteFramebuffersEXT(1, &copy_context_.frame_buffer); CHECK_GL_ERROR();
   glDeleteTextures(1, &copy_context_.frame_buffer_texture); CHECK_GL_ERROR();
   glDeleteBuffers(1, &copy_context_.pixel_buffer); CHECK_GL_ERROR();
   if (copy_context_.use_fence) {
     glDeleteFencesAPPLE(1, &copy_context_.fence); CHECK_GL_ERROR();
   }
   copy_context_.Reset();
 }
 
 }  // namespace content