services/ui: Detect when a video is playing

cc/surfaces/surface_aggregator.h

 // Copyright 2014 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.
 
 #ifndef CC_SURFACES_SURFACE_AGGREGATOR_H_
 #define CC_SURFACES_SURFACE_AGGREGATOR_H_
 
 #include <memory>
 #include <set>
 #include <unordered_map>
@@ skipping 42 matching lines @@
     bool is_clipped;
     gfx::Rect rect;
   };
 
   struct PrewalkResult {
     PrewalkResult();
     ~PrewalkResult();
     // This is the set of Surfaces that were referenced by another Surface, but
     // not included in a SurfaceDrawQuad.
     std::set<SurfaceId> undrawn_surfaces;
+    bool may_contain_video = false;
   };
 
   ClipData CalculateClipRect(const ClipData& surface_clip,
                              const ClipData& quad_clip,
                              const gfx::Transform& target_transform);
 
   RenderPassId RemapPassId(RenderPassId surface_local_pass_id,
                            const SurfaceId& surface_id);
 
   void HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
@@ skipping 95 matching lines @@
   TransferableResourceArray* dest_resource_list_;
 
   base::WeakPtrFactory<SurfaceAggregator> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_