Compute style-determined compositing reasons during recalc style

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>
 
 namespace WebCore {
 
 const uint64_t CompositingReasonNone                                   = 0;
+const uint64_t CompositingReasonAll                                    = ~static_cast<uint64_t>(0);
 
 // Intrinsic reasons that can be known right away by the layer
 const uint64_t CompositingReason3DTransform                            = UINT64_C(1) << 0;
 const uint64_t CompositingReasonVideo                                  = UINT64_C(1) << 1;
 const uint64_t CompositingReasonCanvas                                 = UINT64_C(1) << 2;
 const uint64_t CompositingReasonPlugin                                 = UINT64_C(1) << 3;
 const uint64_t CompositingReasonIFrame                                 = UINT64_C(1) << 4;
 const uint64_t CompositingReasonBackfaceVisibilityHidden               = UINT64_C(1) << 5;
 const uint64_t CompositingReasonActiveAnimation                        = UINT64_C(1) << 6;
 const uint64_t CompositingReasonTransitionProperty                     = UINT64_C(1) << 7;
@@ skipping 57 matching lines @@
     | CompositingReasonTransitionProperty
     | CompositingReasonFilters
     | CompositingReasonPositionFixed
     | CompositingReasonPositionSticky
     | CompositingReasonOverflowScrollingTouch
     | CompositingReasonOverflowScrollingParent
     | CompositingReasonOutOfFlowClipping
     | CompositingReasonVideoOverlay
     | CompositingReasonWillChange;
 
-const uint64_t CompositingReasonComboAllStyleDeterminedDirectReasons =
+const uint64_t CompositingReasonComboAllStyleDeterminedReasons =
     CompositingReason3DTransform
-    | CompositingReasonVideo
-    | CompositingReasonCanvas
-    | CompositingReasonPlugin
-    | CompositingReasonIFrame
     | CompositingReasonBackfaceVisibilityHidden
-    | CompositingReasonActiveAnimation
     | CompositingReasonTransitionProperty
     | CompositingReasonFilters
-    | CompositingReasonVideoOverlay
     | CompositingReasonWillChange;
 
 const uint64_t CompositingReasonComboReasonsThatRequireOwnBacking =
     CompositingReasonComboAllDirectReasons
     | CompositingReasonOverlap
     | CompositingReasonAssumedOverlap
     | CompositingReasonNegativeZIndexChildren
     | CompositingReasonNoSquashingTargetFound
     | CompositingReasonTransformWithCompositedDescendants
     | CompositingReasonOpacityWithCompositedDescendants
@@ skipping 157 matching lines @@
         "layerForMask",
         "Secondary layer, to contain the mask contents" },
     { CompositingReasonLayerForClippingMask,
         "layerForClippingMask",
         "Secondary layer, for clipping mask" }
 };
 
 } // namespace WebCore
 
 #endif // CompositingReasons_h