CC Animations: Enable external animation host for blink.

content/renderer/render_thread_impl.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_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 650 matching lines @@
   GetContentClient()->renderer()->RenderThreadStarted();
 
   InitSkiaEventTracer();
   base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
       skia::SkiaMemoryDumpProvider::GetInstance(), "Skia", nullptr);
 
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   cc::LayerSettings layer_settings;
-  if (command_line.HasSwitch(switches::kEnableCompositorAnimationTimelines))
-    layer_settings.use_compositor_animation_timelines = true;
+  layer_settings.use_compositor_animation_timelines =
+      !command_line.HasSwitch(switches::kDisableCompositorAnimationTimelines);
   cc_blink::WebLayerImpl::SetLayerSettings(layer_settings);
   cc::SetClientNameForMetrics("Renderer");
 
   is_threaded_animation_enabled_ =
       !command_line.HasSwitch(cc::switches::kDisableThreadedAnimation);
 
   is_zero_copy_enabled_ = command_line.HasSwitch(switches::kEnableZeroCopy);
   is_partial_raster_enabled_ =
       command_line.HasSwitch(switches::kEnablePartialRaster);
   is_gpu_memory_buffer_compositor_resources_enabled_ = command_line.HasSwitch(
@@ skipping 1308 matching lines @@
 
 void RenderThreadImpl::ReleaseFreeMemory() {
   base::allocator::ReleaseFreeMemory();
   discardable_shared_memory_manager()->ReleaseFreeMemory();
 
   if (blink_platform_impl_)
     blink::decommitFreeableMemory();
 }
 
 }  // namespace content