services/ui: Detect when a video is playing

services/ui/ws/server_window_surface.cc

 // Copyright 2015 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 "services/ui/ws/server_window_surface.h"
 
 #include "base/callback.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/surface_draw_quad.h"
@@ skipping 46 matching lines @@
     // this we schedule destruction via the delegate. The delegate will call
     // us back when we're not waiting on a frame to be drawn (which may be
     // synchronously).
     if (!surface_id_.is_null()) {
       surfaces_scheduled_for_destruction_.insert(surface_id_);
       window()->delegate()->ScheduleSurfaceDestruction(window());
     }
     surface_id_ = surface_id_allocator_.GenerateId();
     surface_factory_.Create(surface_id_);
   }
+  may_contain_video_ = frame.metadata.may_contain_video;
   surface_factory_.SubmitCompositorFrame(surface_id_, std::move(frame),
                                          callback);
   last_submitted_frame_size_ = frame_size;
   window()->delegate()->OnScheduleWindowPaint(window());
 }
 
 void ServerWindowSurface::DestroySurfacesScheduledForDestruction() {
   std::set<cc::SurfaceId> surfaces;
   surfaces.swap(surfaces_scheduled_for_destruction_);
   for (auto& id : surfaces)
@@ skipping 11 matching lines @@
   client_->ReturnResources(mojo::Array<cc::ReturnedResource>::From(resources));
 }
 
 void ServerWindowSurface::SetBeginFrameSource(
     cc::BeginFrameSource* begin_frame_source) {
   // TODO(tansell): Implement this.
 }
 
 }  // namespace ws
 }  // namespace ui