Remove sparsity tolerance check when considering squashing layers

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 16 matching lines @@
 const uint64_t CompositingReasonOverflowScrollingTouch                   = UINT64_C(1) << 9;
 const uint64_t CompositingReasonOverflowScrollingParent                  = UINT64_C(1) << 10;
 const uint64_t CompositingReasonOutOfFlowClipping                        = UINT64_C(1) << 11;
 const uint64_t CompositingReasonWillChangeCompositingHint                = UINT64_C(1) << 13;
 
 // Overlap reasons that require knowing what's behind you in paint-order before knowing the answer
 const uint64_t CompositingReasonAssumedOverlap                           = UINT64_C(1) << 14;
 const uint64_t CompositingReasonOverlap                                  = UINT64_C(1) << 15;
 const uint64_t CompositingReasonNegativeZIndexChildren                   = UINT64_C(1) << 16;
 const uint64_t CompositingReasonScrollsWithRespectToSquashingLayer       = UINT64_C(1) << 17;
-const uint64_t CompositingReasonSquashingSparsityExceeded                = UINT64_C(1) << 18;
 const uint64_t CompositingReasonSquashingClippingContainerMismatch       = UINT64_C(1) << 19;
 const uint64_t CompositingReasonSquashingOpacityAncestorMismatch         = UINT64_C(1) << 20;
 const uint64_t CompositingReasonSquashingTransformAncestorMismatch       = UINT64_C(1) << 21;
 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;
@@ skipping 71 matching lines @@
     | CompositingReasonComboCompositedDescendants
     | CompositingReasonCombo3DDescendants
     | CompositingReasonInlineTransform;
 
 const uint64_t CompositingReasonComboReasonsThatRequireOwnBacking =
     CompositingReasonComboAllDirectReasons
     | CompositingReasonOverlap
     | CompositingReasonAssumedOverlap
     | CompositingReasonNegativeZIndexChildren
     | CompositingReasonScrollsWithRespectToSquashingLayer
-    | CompositingReasonSquashingSparsityExceeded
     | CompositingReasonSquashingClippingContainerMismatch
     | CompositingReasonSquashingOpacityAncestorMismatch
     | CompositingReasonSquashingTransformAncestorMismatch
     | CompositingReasonSquashingFilterAncestorMismatch
     | CompositingReasonSquashingWouldBreakPaintOrder
     | CompositingReasonSquashingVideoIsDisallowed
     | CompositingReasonSquashedLayerClipsCompositingDescendants
     | CompositingReasonTransformWithCompositedDescendants
     | CompositingReasonOpacityWithCompositedDescendants
     | CompositingReasonMaskWithCompositedDescendants
@@ skipping 26 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