Tweak priorities of paint invalidation reasons

third_party/WebKit/Source/core/layout/LayoutObject.h

Index: third_party/WebKit/Source/core/layout/LayoutObject.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.h b/third_party/WebKit/Source/core/layout/LayoutObject.h
index d0d231ec9312fbfbf1a1bd3c54fdb8f852592751..06d0afdf589946cb0a73a9bed9a9f3ac6db53ac2 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -1120,11 +1120,13 @@ public:
     void invalidatePaintIncludingNonSelfPaintingLayerDescendants(const LayoutBoxModelObject& paintInvalidationContainer);
     void setShouldDoFullPaintInvalidationIncludingNonCompositingDescendants();
 
-    // Returns true if the object will not generate any effective painted output.
+    // Returns true if the object itself will not generate any effective painted output no matter what
+    // size the object is. For example, this function can return false for an object whose size is
+    // currently 0x0 but would have effective painted output if it was set a non-empty size.
     // It's used to skip unforced paint invalidation (which is when shouldDoFullPaintInvalidation
     // is false, but mayNeedPaintInvalidation or childShouldCheckForPaintInvalidation is true) to
     // avoid unnecessary paint invalidations of empty areas covered by such objects.
-    virtual bool paintedOutputOfObjectHasNoEffect() const { return false; }
+    virtual bool paintedOutputOfObjectHasNoEffectRegardlessOfSize() const { return false; }
 
     // Returns the rect that should have paint invalidated whenever this object changes. The rect is in the view's
     // coordinate space. This method deals with outlines and overflow.