Remove EnableThreadedCompositing from the browser.

content/renderer/render_widget.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/renderer/render_widget.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 385 matching lines @@
       outstanding_ime_acks_(0),
       body_background_color_(SK_ColorWHITE),
 #endif
       popup_origin_scale_for_emulation_(0.f),
       resizing_mode_selector_(new ResizingModeSelector()),
       context_menu_source_type_(ui::MENU_SOURCE_MOUSE) {
   if (!swapped_out)
     RenderProcess::current()->AddRefProcess();
   DCHECK(RenderThread::Get());
   is_threaded_compositing_enabled_ =
-      CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableThreadedCompositing);
+      !CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableThreadedCompositing);

[piman, 2014/06/13 20:55:19]

nit: can we test from !!RenderThreadImpl::Get()->compositor_message_loop_proxy()
so that the logic is in a single place?

[danakj, 2014/06/13 21:46:35]

Done.

 }
 
 RenderWidget::~RenderWidget() {
   DCHECK(!webwidget_) << "Leaking our WebWidget!";
 
   // If we are swapped out, we have released already.
   if (!is_swapped_out_ && RenderProcess::current())
     RenderProcess::current()->ReleaseProcess();
 }
 
@@ skipping 1652 matching lines @@
 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 }  // namespace content