Bug 866259. Vector images need to send the unlocked draw notification too because it is also responsible for managing the number of animation consumers. r=joedrew

image/src/VectorImage.cpp

@@ -653,6 +653,11 @@ VectorImage::Draw(gfxContext* aContext,
     NS_WARNING("Refusing to make re-entrant call to VectorImage::Draw");
     return NS_ERROR_FAILURE;
   }
+
+  if (mAnimationConsumers == 0 && mStatusTracker) {
+    mStatusTracker->OnUnlockedDraw();
+  }
+
   AutoRestore<bool> autoRestoreIsDrawing(mIsDrawing);
   mIsDrawing = true;