Fix gradient background invalidation when HTML size changes

third_party/WebKit/Source/platform/graphics/PaintInvalidationReason.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PaintInvalidationReason_h
 #define PaintInvalidationReason_h
 
 #include "platform/PlatformExport.h"
 
 namespace blink {
@@ skipping 17 matching lines @@
   PaintInvalidationBecameInvisible,
   PaintInvalidationScroll,
   PaintInvalidationSelection,
   PaintInvalidationOutline,
   PaintInvalidationSubtree,
   PaintInvalidationLayoutObjectInsertion,
   PaintInvalidationLayoutObjectRemoval,
   PaintInvalidationSVGResourceChange,
   PaintInvalidationBackgroundOnScrollingContentsLayer,
   PaintInvalidationCaret,
+  PaintInvalidationViewBackground,
   PaintInvalidationForTesting,
   // PaintInvalidationDelayedFull means that PaintInvalidationFull is needed in
   // order to fully paint the content, but that painting of the object can be
   // delayed until a future frame. This can be the case for an object whose
   // content is not visible to the user.
   PaintInvalidationDelayedFull,
 
   PaintInvalidationReasonMax = PaintInvalidationDelayedFull
 };
 
 PLATFORM_EXPORT const char* paintInvalidationReasonToString(
     PaintInvalidationReason);
 
 inline bool isFullPaintInvalidationReason(PaintInvalidationReason reason) {
   return reason >= PaintInvalidationFull;
 }
 
 inline bool isImmediateFullPaintInvalidationReason(
     PaintInvalidationReason reason) {
   return isFullPaintInvalidationReason(reason) &&
          reason != PaintInvalidationDelayedFull;
 }
 
 }  // namespace blink
 
 #endif  // PaintInvalidationReason_h