cc: Allow sending BeginMainFrame before draw or activation

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 80 matching lines @@
   // For web contents, layer transforms should scale up the contents of layers
   // to keep content always crisp when possible.
   settings.layer_transforms_should_scale_layer_contents = true;
 
   settings.throttle_frame_production =
       !cmd->HasSwitch(switches::kDisableGpuVsync);
   settings.begin_frame_scheduling_enabled =
       cmd->HasSwitch(switches::kEnableBeginFrameScheduling);
   settings.deadline_scheduling_enabled =
       cc::switches::IsDeadlineSchedulingEnabled();
+  settings.start_commit_before_draw_enabled =
+      cc::switches::IsStartCommitBeforeDrawEnabled();
+  settings.start_commit_before_activate_enabled =
+      cc::switches::IsStartCommitBeforeActivateEnabled();
   settings.using_synchronous_renderer_compositor =
       widget->UsingSynchronousRendererCompositor();
   settings.per_tile_painting_enabled =
       cmd->HasSwitch(cc::switches::kEnablePerTilePainting);
   settings.accelerated_animation_enabled =
       !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
   settings.force_direct_layer_drawing =
       cmd->HasSwitch(cc::switches::kForceDirectLayerDrawing);
 
   int default_tile_width = settings.default_tile_size.width();
@@ skipping 485 matching lines @@
   return RenderThreadImpl::current()->OffscreenContextProviderForMainThread();
 }
 
 scoped_refptr<cc::ContextProvider>
 RenderWidgetCompositor::OffscreenContextProviderForCompositorThread() {
   return RenderThreadImpl::current()->
       OffscreenContextProviderForCompositorThread();
 }
 
 }  // namespace content