Remove CSSCompositing

sky/engine/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 "platform/PlatformExport.h"
 #include "wtf/MathExtras.h"
 #include <stdint.h>
@@ skipping 29 matching lines @@
 const uint64_t CompositingReasonSquashingFilterAncestorMismatch          = UINT64_C(1) << 22;
 const uint64_t CompositingReasonSquashingWouldBreakPaintOrder            = UINT64_C(1) << 23;
 const uint64_t CompositingReasonSquashingVideoIsDisallowed               = UINT64_C(1) << 24;
 const uint64_t CompositingReasonSquashedLayerClipsCompositingDescendants = UINT64_C(1) << 25;
 
 // Subtree reasons that require knowing what the status of your subtree is before knowing the answer
 const uint64_t CompositingReasonTransformWithCompositedDescendants       = UINT64_C(1) << 28;
 const uint64_t CompositingReasonOpacityWithCompositedDescendants         = UINT64_C(1) << 29;
 const uint64_t CompositingReasonMaskWithCompositedDescendants            = UINT64_C(1) << 30;
 const uint64_t CompositingReasonFilterWithCompositedDescendants          = UINT64_C(1) << 32;
-const uint64_t CompositingReasonBlendingWithCompositedDescendants        = UINT64_C(1) << 33;
+// TODO(sky): Unused 33
 const uint64_t CompositingReasonClipsCompositingDescendants              = UINT64_C(1) << 34;
 const uint64_t CompositingReasonPerspectiveWith3DDescendants             = UINT64_C(1) << 35;
 const uint64_t CompositingReasonPreserve3DWith3DDescendants              = UINT64_C(1) << 36;
-const uint64_t CompositingReasonIsolateCompositedDescendants             = UINT64_C(1) << 38;
+// TODO(sky): Unused 37 & 38
 
 // The root layer is a special case that may be forced to be a layer, but also it needs to be
 // a layer if anything else in the subtree is composited.
 const uint64_t CompositingReasonRoot                                     = UINT64_C(1) << 39;
 
 // CompositedLayerMapping internal hierarchy reasons
 const uint64_t CompositingReasonLayerForAncestorClip                     = UINT64_C(1) << 40;
 const uint64_t CompositingReasonLayerForDescendantClip                   = UINT64_C(1) << 41;
 const uint64_t CompositingReasonLayerForPerspective                      = UINT64_C(1) << 42;
 // FIXME(sky): 43 is unused.
@@ skipping 28 matching lines @@
 
 const uint64_t CompositingReasonComboAllDirectStyleDeterminedReasons =
     CompositingReason3DTransform
     | CompositingReasonBackfaceVisibilityHidden
     | CompositingReasonActiveAnimation
     | CompositingReasonTransitionProperty
     | CompositingReasonWillChangeCompositingHint;
 
 const uint64_t CompositingReasonComboCompositedDescendants =
     CompositingReasonTransformWithCompositedDescendants
-    | CompositingReasonIsolateCompositedDescendants
     | CompositingReasonOpacityWithCompositedDescendants
     | CompositingReasonMaskWithCompositedDescendants
     | CompositingReasonFilterWithCompositedDescendants
-    | CompositingReasonBlendingWithCompositedDescendants
     | CompositingReasonClipsCompositingDescendants;
 
 const uint64_t CompositingReasonCombo3DDescendants =
     CompositingReasonPreserve3DWith3DDescendants
     | CompositingReasonPerspectiveWith3DDescendants;
 
 const uint64_t CompositingReasonComboAllStyleDeterminedReasons =
     CompositingReasonComboAllDirectStyleDeterminedReasons
     | CompositingReasonComboCompositedDescendants
     | CompositingReasonCombo3DDescendants
     | CompositingReasonInlineTransform;
 
 const uint64_t CompositingReasonComboReasonsThatRequireOwnBacking =
     CompositingReasonComboAllDirectReasons
     | CompositingReasonOverlap
     | CompositingReasonAssumedOverlap
     | CompositingReasonNegativeZIndexChildren
     | CompositingReasonScrollsWithRespectToSquashingLayer
     | CompositingReasonSquashingClippingContainerMismatch
     | CompositingReasonSquashingOpacityAncestorMismatch
     | CompositingReasonSquashingTransformAncestorMismatch
     | CompositingReasonSquashingFilterAncestorMismatch
     | CompositingReasonSquashingWouldBreakPaintOrder
     | CompositingReasonSquashingVideoIsDisallowed
     | CompositingReasonSquashedLayerClipsCompositingDescendants
     | CompositingReasonTransformWithCompositedDescendants
     | CompositingReasonOpacityWithCompositedDescendants
     | CompositingReasonMaskWithCompositedDescendants
     | CompositingReasonFilterWithCompositedDescendants
-    | CompositingReasonBlendingWithCompositedDescendants
-    | CompositingReasonIsolateCompositedDescendants
     | CompositingReasonPreserve3DWith3DDescendants; // preserve-3d has to create backing store to ensure that 3d-transformed elements intersect.
 
 const uint64_t CompositingReasonComboSquashableReasons =
     CompositingReasonOverlap
     | CompositingReasonAssumedOverlap
     | CompositingReasonOverflowScrollingParent;
 
 typedef uint64_t CompositingReasons;
 
 // Any reasons other than overlap or assumed overlap will require the layer to be separately compositing.
@@ skipping 13 matching lines @@
     const char* shortName;
     const char* description;
 };
 
 PLATFORM_EXPORT extern const CompositingReasonStringMap kCompositingReasonStringMap[];
 PLATFORM_EXPORT extern size_t kNumberOfCompositingReasons;
 
 } // namespace blink
 
 #endif // CompositingReasons_h