Remove will-change: contents GPU rasterization hint

Source/platform/graphics/CompositingReasons.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 CompositingReasons_h
 #define CompositingReasons_h
 
 #include "wtf/MathExtras.h"
 #include <stdint.h>
 
@@ skipping 12 matching lines @@
 const uint64_t CompositingReasonActiveAnimation                        = UINT64_C(1) << 6;
 const uint64_t CompositingReasonTransitionProperty                     = UINT64_C(1) << 7;
 const uint64_t CompositingReasonFilters                                = UINT64_C(1) << 8;
 const uint64_t CompositingReasonPositionFixed                          = UINT64_C(1) << 9;
 const uint64_t CompositingReasonPositionSticky                         = UINT64_C(1) << 10;
 const uint64_t CompositingReasonOverflowScrollingTouch                 = UINT64_C(1) << 11;
 const uint64_t CompositingReasonOverflowScrollingParent                = UINT64_C(1) << 12;
 const uint64_t CompositingReasonOutOfFlowClipping                      = UINT64_C(1) << 13;
 const uint64_t CompositingReasonVideoOverlay                           = UINT64_C(1) << 14;
 const uint64_t CompositingReasonWillChangeCompositingHint              = UINT64_C(1) << 15;
-const uint64_t CompositingReasonWillChangeGpuRasterizationHint         = UINT64_C(1) << 16;
+// Bit 16 is available.
 
 // Overlap reasons that require knowing what's behind you in paint-order before knowing the answer
 const uint64_t CompositingReasonAssumedOverlap                         = UINT64_C(1) << 17;
 const uint64_t CompositingReasonOverlap                                = UINT64_C(1) << 18;
 const uint64_t CompositingReasonNegativeZIndexChildren                 = UINT64_C(1) << 19;
 const uint64_t CompositingReasonNoSquashingTargetFound                 = UINT64_C(1) << 20;
 
 // Subtree reasons that require knowing what the status of your subtree is before knowing the answer
 const uint64_t CompositingReasonTransformWithCompositedDescendants     = UINT64_C(1) << 21;
 const uint64_t CompositingReasonOpacityWithCompositedDescendants       = UINT64_C(1) << 22;
@@ skipping 37 matching lines @@
     | CompositingReasonBackfaceVisibilityHidden
     | CompositingReasonActiveAnimation
     | CompositingReasonTransitionProperty
     | CompositingReasonFilters
     | CompositingReasonPositionFixed
     | CompositingReasonPositionSticky
     | CompositingReasonOverflowScrollingTouch
     | CompositingReasonOverflowScrollingParent
     | CompositingReasonOutOfFlowClipping
     | CompositingReasonVideoOverlay
-    | CompositingReasonWillChangeCompositingHint
-    | CompositingReasonWillChangeGpuRasterizationHint;
+    | CompositingReasonWillChangeCompositingHint;
 
 const uint64_t CompositingReasonComboAllStyleDeterminedReasons =
     CompositingReason3DTransform
     | CompositingReasonBackfaceVisibilityHidden
     | CompositingReasonActiveAnimation
     | CompositingReasonTransitionProperty
     | CompositingReasonFilters
-    | CompositingReasonWillChangeCompositingHint
-    | CompositingReasonWillChangeGpuRasterizationHint;
+    | CompositingReasonWillChangeCompositingHint;
 
 const uint64_t CompositingReasonComboReasonsThatRequireOwnBacking =
     CompositingReasonComboAllDirectReasons
     | CompositingReasonOverlap
     | CompositingReasonAssumedOverlap
     | CompositingReasonNegativeZIndexChildren
     | CompositingReasonNoSquashingTargetFound
     | CompositingReasonTransformWithCompositedDescendants
     | CompositingReasonOpacityWithCompositedDescendants
     | CompositingReasonMaskWithCompositedDescendants
@@ skipping 74 matching lines @@
         "Scroll parent is not an ancestor" },
     { CompositingReasonOutOfFlowClipping,
         "outOfFlowClipping",
         "Has clipping ancestor" },
     { CompositingReasonVideoOverlay,
         "videoOverlay",
         "Is overlay controls for video" },
     { CompositingReasonWillChangeCompositingHint,
         "willChange",
         "Has a will-change compositing hint" },
-    { CompositingReasonWillChangeGpuRasterizationHint,
-        "willChange",
-        "Has a will-change GPU-rasterization hint" },
+    { 0, 0, 0 }, // Available.
     { CompositingReasonAssumedOverlap,
         "assumedOverlap",
         "Might overlap other composited content" },
     { CompositingReasonOverlap,
         "overlap",
         "Overlaps other composited content" },
     { CompositingReasonNegativeZIndexChildren,
         "negativeZIndexChildren",
         "Parent with composited negative z-index content" },
     {  CompositingReasonNoSquashingTargetFound,
@@ skipping 75 matching lines @@
         "layerForMask",
         "Secondary layer, to contain the mask contents" },
     { CompositingReasonLayerForClippingMask,
         "layerForClippingMask",
         "Secondary layer, for clipping mask" }
 };
 
 } // namespace WebCore
 
 #endif // CompositingReasons_h