cc: Introduce forward_begin_frames_to_children and use_external_begin_frame_source

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 158 matching lines @@
   CommandLine* cmd = CommandLine::ForCurrentProcess();
 
   cc::LayerTreeSettings settings;
 
   // 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 =
+  settings.use_external_begin_frame_source =
       cmd->HasSwitch(switches::kEnableBeginFrameScheduling);
   settings.main_frame_before_activation_enabled =
       cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
       !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
   settings.report_overscroll_only_for_scrollable_axes = true;
   settings.accelerated_animation_enabled =
       !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
 
   settings.default_tile_size = CalculateDefaultTileSize();
   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
@@ skipping 343 matching lines @@
         render_thread->compositor_message_loop_proxy();
     shared_bitmap_manager = render_thread->shared_bitmap_manager();
     gpu_memory_buffer_manager = render_thread->gpu_memory_buffer_manager();
     main_thread_compositor_task_runner =
         render_thread->main_thread_compositor_task_runner();
   }
   scoped_ptr<cc::BeginFrameSource> external_begin_frame_source;
 #if defined(OS_ANDROID)
   if (SynchronousCompositorFactory* factory =
       SynchronousCompositorFactory::GetInstance()) {
-    DCHECK(settings.begin_frame_scheduling_enabled);
+    DCHECK(settings.use_external_begin_frame_source);
     external_begin_frame_source =
         factory->CreateExternalBeginFrameSource(widget_->routing_id());
   }
 #endif
   if (render_thread &&
       !external_begin_frame_source.get() &&
-      settings.begin_frame_scheduling_enabled) {
+      settings.use_external_begin_frame_source) {
     external_begin_frame_source.reset(new CompositorExternalBeginFrameSource(
                                               widget_->routing_id()));
   }
   if (compositor_message_loop_proxy.get()) {
     layer_tree_host_ =
         cc::LayerTreeHost::CreateThreaded(this,
                                           shared_bitmap_manager,
                                           gpu_memory_buffer_manager,
                                           settings,
                                           main_thread_compositor_task_runner,
@@ skipping 334 matching lines @@
   widget_->OnSwapBuffersAborted();
 }
 
 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 }
 
 }  // namespace content