Invalidate background-attachment:fixed on scroll.

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

Index: third_party/WebKit/Source/core/layout/LayoutObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.cpp b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
index fa83feb98e79d33f2016f7367f745020d2ef1031..89fe6a7b87d7ff195695237ad2797ff35fb182d4 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -2494,7 +2494,7 @@ void LayoutObject::willBeDestroyed()
     ResourceLoadPriorityOptimizer::resourceLoadPriorityOptimizer()->removeLayoutObject(this);
 
     if (frameView())
-        setIsSlowRepaintObject(false);
+        setIsBackgroundAttachmentFixedObject(false);
 }
 
 void LayoutObject::insertedIntoTree()
@@ -3396,16 +3396,16 @@ void LayoutObject::invalidatePaintIncludingNonSelfPaintingLayerDescendants(const
     }
 }
 
-void LayoutObject::setIsSlowRepaintObject(bool isSlowRepaintObject)
+void LayoutObject::setIsBackgroundAttachmentFixedObject(bool isBackgroundAttachmentFixedObject)
 {
     ASSERT(frameView());
-    if (m_bitfields.isSlowRepaintObject() == isSlowRepaintObject)
+    if (m_bitfields.isBackgroundAttachmentFixedObject() == isBackgroundAttachmentFixedObject)
         return;
-    m_bitfields.setIsSlowRepaintObject(isSlowRepaintObject);
-    if (isSlowRepaintObject)
-        frameView()->addSlowRepaintObject();
+    m_bitfields.setIsBackgroundAttachmentFixedObject(isBackgroundAttachmentFixedObject);
+    if (isBackgroundAttachmentFixedObject)
+        frameView()->addBackgroundAttachmentFixedObject(this);
     else
-        frameView()->removeSlowRepaintObject();
+        frameView()->removeBackgroundAttachmentFixedObject(this);
 }
 
 } // namespace blink