cc: Implement deadine scheduling disabled by default

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 4efbffa144c3f3c7f4cb2c2a2fff8891f7c2eef1..7a0492aeb0e27010b4d63e8062afab20033f8693 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -183,6 +183,9 @@ class CC_EXPORT LayerTreeHostImpl
   // immediately if any notifications had been blocked while blocking.
   virtual void BlockNotifyReadyToActivateForTesting(bool block);
 
+  // This allows us to inject DidInitializeVisibleTile events for testing.
+  void DidInitializeVisibleTileForTesting();
+
   bool device_viewport_valid_for_tile_management() const {
     return device_viewport_valid_for_tile_management_;
   }
@@ -405,8 +408,6 @@ class CC_EXPORT LayerTreeHostImpl
 
   ResourceProvider::ResourceId ResourceIdForUIResource(UIResourceId uid) const;
 
-  void DidInitializeVisibleTileForTesting() { DidInitializeVisibleTile(); }
-
  protected:
   LayerTreeHostImpl(
       const LayerTreeSettings& settings,
@@ -478,7 +479,7 @@ class CC_EXPORT LayerTreeHostImpl
                               bool zero_budget);
   void EnforceManagedMemoryPolicy(const ManagedMemoryPolicy& policy);
 
-  void DidInitializeVisibleTile();
+  void DidInitializeVisibleTile(bool notify_client);
 
   typedef base::hash_map<UIResourceId, ResourceProvider::ResourceId>
       UIResourceMap;