Split ImageResourceClient into ResourceClient and ImageResourceObserver [2/2]

third_party/WebKit/Source/core/fetch/ImageResourceObserver.h

Index: third_party/WebKit/Source/core/fetch/ImageResourceObserver.h
diff --git a/third_party/WebKit/Source/core/fetch/ImageResourceObserver.h b/third_party/WebKit/Source/core/fetch/ImageResourceObserver.h
index 9a002c477c12100c035465e2c87e7df94b32d336..f9a31a54bba56bbf669ff92222dbebf7ab24c0e3 100644
--- a/third_party/WebKit/Source/core/fetch/ImageResourceObserver.h
+++ b/third_party/WebKit/Source/core/fetch/ImageResourceObserver.h
@@ -41,6 +41,11 @@ public:
     // because we are animating. If not null, the IntRect is the changed rect of the image.
     virtual void imageChanged(ImageResource*, const IntRect* = 0) { }
 
+    // Similar to ResourceClient::notifyFinished(), except for a slight call
+    // order difference. This is to avoid an ImageResourceObserver from being
+    // also a ResourceClient just to be notified for load finish.
+    virtual void imageNotifyFinished(ImageResource*) { }
+
     // Called to find out if this client wants to actually display the image. Used to tell when we
     // can halt animation. Content nodes that hold image refs for example would not render the image,
     // but LayoutImages would (assuming they have visibility: visible and their layout tree isn't hidden