Turn on compositing for animations with software compositor.

content/browser/gpu/gpu_data_manager_impl_private.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/browser/gpu/gpu_data_manager_impl_private.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 769 matching lines @@
   }
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_VIDEO))
     prefs->accelerated_compositing_for_video_enabled = false;
 
   // Accelerated video and animation are slower than regular when using
   // SwiftShader. 3D CSS or Pepper 3D may also be too slow to be worthwhile.
   if (ShouldUseSwiftShader()) {
     prefs->accelerated_compositing_for_video_enabled = false;
     prefs->accelerated_compositing_for_animation_enabled = false;
     prefs->accelerated_compositing_for_3d_transforms_enabled = false;
+    prefs->accelerated_compositing_for_animation_enabled = false;

[jbauman, 2014/03/07 22:59:29]

This line is redundant with the one above.

[danakj, 2014/03/07 23:02:36]

Oh, I was mimicing line 779. Should we just always have it set to true then?

[jbauman, 2014/03/07 23:09:44]

I mean, this is literally a duplicate of line 788.

[danakj, 2014/03/07 23:11:11]

Ohhh, order changed. :D thanks!

     prefs->accelerated_compositing_for_plugins_enabled = false;
     prefs->pepper_3d_enabled = false;
   }
 
   if (use_software_compositor_) {
     prefs->force_compositing_mode = true;
     prefs->accelerated_compositing_enabled = true;
     prefs->accelerated_compositing_for_3d_transforms_enabled = true;
+    prefs->accelerated_compositing_for_animation_enabled = true;
     prefs->accelerated_compositing_for_plugins_enabled = true;
     prefs->accelerated_compositing_for_video_enabled = true;
   }
 
 #if defined(USE_AURA)
   if (!CanUseGpuBrowserCompositor()) {
     prefs->accelerated_2d_canvas_enabled = false;
     prefs->pepper_3d_enabled = false;
   }
 #endif
@@ skipping 366 matching lines @@
 
 void GpuDataManagerImplPrivate::OnGpuProcessInitFailure() {
   gpu_process_accessible_ = false;
   gpu_info_.finalized = true;
   complete_gpu_info_already_requested_ = true;
   // Some observers might be waiting.
   NotifyGpuInfoUpdate();
 }
 
 }  // namespace content