services/ui: Detect when a video is playing

cc/layers/layer_impl.h

 // Copyright 2011 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_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 403 matching lines @@
       std::unique_ptr<base::trace_event::ConvertableToTraceFormat> debug_info);
 
   void set_is_drawn_render_surface_layer_list_member(bool is_member) {
     is_drawn_render_surface_layer_list_member_ = is_member;
   }
 
   bool is_drawn_render_surface_layer_list_member() const {
     return is_drawn_render_surface_layer_list_member_;
   }
 
+  void set_may_contain_video(bool yes) { may_contain_video_ = yes; }
+  bool may_contain_video() const { return may_contain_video_; }
+
   void Set3dSortingContextId(int id);
   int sorting_context_id() { return sorting_context_id_; }
 
   // Get the correct invalidation region instead of conservative Rect
   // for layers that provide it.
   virtual Region GetInvalidationRegionForDebugging();
 
   virtual gfx::Rect GetEnclosingRectInTargetSpace() const;
 
   void set_scrolls_drawn_descendant(bool scrolls_drawn_descendant) {
@@ skipping 77 matching lines @@
 
   gfx::Vector2dF offset_to_transform_parent_;
   uint32_t main_thread_scrolling_reasons_;
 
   bool user_scrollable_horizontal_ : 1;
   bool user_scrollable_vertical_ : 1;
   bool should_flatten_transform_from_property_tree_ : 1;
 
   // Tracks if drawing-related properties have changed since last redraw.
   bool layer_property_changed_ : 1;
+  bool may_contain_video_ : 1;
 
   bool masks_to_bounds_ : 1;
   bool contents_opaque_ : 1;
   bool use_parent_backface_visibility_ : 1;
   bool use_local_transform_for_backface_visibility_ : 1;
   bool should_check_backface_visibility_ : 1;
   bool draws_content_ : 1;
   bool is_drawn_render_surface_layer_list_member_ : 1;
 
   // This is true if and only if the layer was ever ready since it last animated
@@ skipping 50 matching lines @@
   bool scrolls_drawn_descendant_ : 1;
   bool has_will_change_transform_hint_ : 1;
   bool needs_push_properties_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_