cc: Implement unified BeginFrame on aura

cc/base/switches.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 "cc/base/switches.h"
 
 #include "base/command_line.h"
 
 namespace cc {
 namespace switches {
@@ skipping 46 matching lines @@
 // Virtual viewport for fixed-position elements, scrollbars during pinch.
 const char kEnablePinchVirtualViewport[] = "enable-pinch-virtual-viewport";
 const char kDisablePinchVirtualViewport[] = "disable-pinch-virtual-viewport";
 
 // Disable partial swap which is needed for some OpenGL drivers / emulators.
 const char kUIDisablePartialSwap[] = "ui-disable-partial-swap";
 
 // Enables the GPU benchmarking extension
 const char kEnableGpuBenchmarking[] = "enable-gpu-benchmarking";
 
+// Use a BeginFrame signal from browser to renderer to schedule rendering.
+const char kEnableBeginFrameScheduling[] = "enable-begin-frame-scheduling";

[brianderson, 2014/12/12 01:17:02]

Where is this flag set for Aura? Is it just command line right now?

[simonhong, 2014/12/15 15:37:27]

This feature is only enabled by command line.
Should we need to add this in about://flags page?

[brianderson, 2014/12/16 00:06:52]

We eventually want to just get rid of this command-line flag. Can we just set
the relevant settings from platform specific code, rather than relying on the
command-line flag?

[simonhong, 2014/12/16 15:13:30]

Changed to set this in the platform specific define.

+
 // Renders a border around compositor layers to help debug and study
 // layer compositing.
 const char kShowCompositedLayerBorders[] = "show-composited-layer-borders";
 const char kUIShowCompositedLayerBorders[] = "ui-show-layer-borders";
 
 // Draws a heads-up-display showing Frames Per Second as well as GPU memory
 // usage. If you also use --vmodule="head*=1" then FPS will also be output to
 // the console log.
 const char kShowFPSCounter[] = "show-fps-counter";
 const char kUIShowFPSCounter[] = "ui-show-fps-counter";
@@ skipping 33 matching lines @@
 const char kUIShowNonOccludingRects[] = "ui-show-nonoccluding-rects";
 
 // Prevents the layer tree unit tests from timing out.
 const char kCCLayerTreeTestNoTimeout[] = "cc-layer-tree-test-no-timeout";
 
 // Makes pixel tests write their output instead of read it.
 const char kCCRebaselinePixeltests[] = "cc-rebaseline-pixeltests";
 
 }  // namespace switches
 }  // namespace cc