[S.P.] Don't draw frames of animated images that are offscreen.

Source/core/layout/LayoutObject.h

Index: Source/core/layout/LayoutObject.h
diff --git a/Source/core/layout/LayoutObject.h b/Source/core/layout/LayoutObject.h
index e6029b3265135bba2d5c9e39a73e6364e12cb132..d9bd423613b67c0ae8704baf77bd564ec780ff16 100644
--- a/Source/core/layout/LayoutObject.h
+++ b/Source/core/layout/LayoutObject.h
@@ -237,22 +237,6 @@ public:
             renderer->assertRendererLaidOut();
     }
 
-    void assertRendererClearedPaintInvalidationState() const
-    {
-#ifndef NDEBUG
-        if (paintInvalidationStateIsDirty()) {
-            showLayoutTreeForThis();
-            ASSERT_NOT_REACHED();
-        }
-#endif
-    }
-
-    void assertSubtreeClearedPaintInvalidationState() const
-    {
-        for (const LayoutObject* renderer = this; renderer; renderer = renderer->nextInPreOrder())
-            renderer->assertRendererClearedPaintInvalidationState();
-    }
-

[Xianzhu, 2015/03/17 23:34:01]

I think we can keep these for a while for non-SP.

[chrishtr, 2015/03/17 23:55:56]

Good point. I can re-add.

[chrishtr, 2015/03/19 22:01:27]

Done.

 #endif
 
     // FIXME: This could be used when changing the size of a renderer without children to skip some invalidations.