Re-land: cc: Add raster finished signals to RasterWorkerPool.

cc/test/fake_tile_manager.h

Index: cc/test/fake_tile_manager.h
diff --git a/cc/test/fake_tile_manager.h b/cc/test/fake_tile_manager.h
index a061ee0ce28f61def611cfc802ba854fb650ef81..f79ea54cda88d9839503416f7e0aec44ce179350 100644
--- a/cc/test/fake_tile_manager.h
+++ b/cc/test/fake_tile_manager.h
@@ -15,6 +15,11 @@ class FakeTileManager : public TileManager {
   FakeTileManager(TileManagerClient* client,
                   ResourceProvider* resource_provider);
 
+  virtual void ScheduleTasks() OVERRIDE {}
+
+  void ReassignMemoryToOOMTilesRequiredForActivation();
+  bool HasBeenAssignedMemory(Tile* tile);
+
   virtual ~FakeTileManager() { }
 };