Gpu Image Decode Controller

cc/tiles/image_decode_controller.h

Index: cc/tiles/image_decode_controller.h
diff --git a/cc/tiles/image_decode_controller.h b/cc/tiles/image_decode_controller.h
index 4bf03d86bd8d41a84d4265c348c46c1497b59f0b..6d3cd29aefaefb8ebd634039b5ee8f52cb8669eb 100644
--- a/cc/tiles/image_decode_controller.h
+++ b/cc/tiles/image_decode_controller.h
@@ -62,6 +62,11 @@ class CC_EXPORT ImageDecodeController {
   // This function informs the controller that now is a good time to clean up
   // memory. This is called periodically from the compositor thread.
   virtual void ReduceCacheUsage() = 0;
+
+  // This function informs the controller that we are hidden and should not be
+  // retaining cached resources longer than needed.
+  virtual void SetShouldAggressivelyFreeResources(
+      bool aggressively_free_resources) = 0;
 };
 
 }  // namespace cc