Implements getImageAnimationPolicy() at ImageLoader.

Source/core/testing/Internals.h

Index: Source/core/testing/Internals.h
diff --git a/Source/core/testing/Internals.h b/Source/core/testing/Internals.h
index 10147df3014f292419455483bee9818db6e2cbeb..a3cd1fa78a39317bbb58291aeb3179361fc7c731 100644
--- a/Source/core/testing/Internals.h
+++ b/Source/core/testing/Internals.h
@@ -111,6 +111,9 @@ public:
     // CSS Animation / Transition testing.
     void pauseAnimations(double pauseTime, ExceptionState&);
 
+    // Advances Time to test whether animated images work properly.

[dmazzoni, 2015/05/27 15:15:30]

Advances Time -> Advances time

[je_julie(Not used), 2015/05/27 16:48:38]

I updated comment with new API name.

+    void advanceTimeWithImage(Element* image, double advancedTime, ExceptionState&);

[dmazzoni, 2015/05/27 15:15:30]

Instead of advancedTime, how about deltaTime to make it clear that this is the
amount of time to be added rather than a time to set it to.

It's always good to be precise, so maybe deltaTimeInSeconds

[je_julie(Not used), 2015/05/27 16:48:38]

Thanks for suggestion.

+
     bool isValidContentSelect(Element* insertionPoint, ExceptionState&);
     Node* treeScopeRootNode(Node*);
     Node* parentTreeScope(Node*);