Remove CompositingReasons.h

sky/engine/platform/graphics/CompositingReasons.h

Index: sky/engine/platform/graphics/CompositingReasons.h
diff --git a/sky/engine/platform/graphics/CompositingReasons.h b/sky/engine/platform/graphics/CompositingReasons.h
deleted file mode 100644
index bf91c82276ffd2530dc05f66f11a8d54781ac42c..0000000000000000000000000000000000000000
--- a/sky/engine/platform/graphics/CompositingReasons.h
+++ /dev/null
@@ -1,167 +0,0 @@
-// 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 SKY_ENGINE_PLATFORM_GRAPHICS_COMPOSITINGREASONS_H_
-#define SKY_ENGINE_PLATFORM_GRAPHICS_COMPOSITINGREASONS_H_
-
-#include <stdint.h>
-#include "sky/engine/platform/PlatformExport.h"
-#include "sky/engine/wtf/MathExtras.h"
-
-namespace blink {
-
-const uint64_t CompositingReasonNone                                     = 0;
-const uint64_t CompositingReasonAll                                      = ~static_cast<uint64_t>(0);
-
-// FIXME(sky): Get rid of all this.
-
-// 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 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;
-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 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;
-const uint64_t CompositingReasonOpacityWithCompositedDescendants         = UINT64_C(1) << 29;
-const uint64_t CompositingReasonMaskWithCompositedDescendants            = UINT64_C(1) << 30;
-const uint64_t CompositingReasonFilterWithCompositedDescendants          = UINT64_C(1) << 32;
-// 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;
-// 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.
-// FIXME(sky): 44 is unused.
-const uint64_t CompositingReasonLayerForOverflowControlsHost             = UINT64_C(1) << 45;
-// FIXME(sky): 46 is unused.
-const uint64_t CompositingReasonLayerForSquashingContents                = UINT64_C(1) << 49;
-const uint64_t CompositingReasonLayerForSquashingContainer               = UINT64_C(1) << 50;
-const uint64_t CompositingReasonLayerForForeground                       = UINT64_C(1) << 51;
-const uint64_t CompositingReasonLayerForBackground                       = UINT64_C(1) << 52;
-const uint64_t CompositingReasonLayerForMask                             = UINT64_C(1) << 53;
-const uint64_t CompositingReasonLayerForClippingMask                     = UINT64_C(1) << 54;
-// FIXME(sky): 55 is unused.
-
-// Composited elements with inline transforms trigger assumed overlap so that
-// we can update their transforms quickly.
-const uint64_t CompositingReasonInlineTransform                          = UINT64_C(1) << 56;
-
-// Various combinations of compositing reasons are defined here also, for more intutive and faster bitwise logic.
-const uint64_t CompositingReasonComboAllDirectReasons =
-    CompositingReason3DTransform
-    | CompositingReasonVideo
-    | CompositingReasonCanvas
-    | CompositingReasonIFrame
-    | CompositingReasonBackfaceVisibilityHidden
-    | CompositingReasonActiveAnimation
-    | CompositingReasonTransitionProperty
-    | CompositingReasonOverflowScrollingTouch
-    | CompositingReasonOverflowScrollingParent
-    | CompositingReasonOutOfFlowClipping
-    | CompositingReasonWillChangeCompositingHint;
-
-const uint64_t CompositingReasonComboAllDirectStyleDeterminedReasons =
-    CompositingReason3DTransform
-    | CompositingReasonBackfaceVisibilityHidden
-    | CompositingReasonActiveAnimation
-    | CompositingReasonTransitionProperty
-    | CompositingReasonWillChangeCompositingHint;
-
-const uint64_t CompositingReasonComboCompositedDescendants =
-    CompositingReasonTransformWithCompositedDescendants
-    | CompositingReasonOpacityWithCompositedDescendants
-    | CompositingReasonMaskWithCompositedDescendants
-    | CompositingReasonFilterWithCompositedDescendants
-    | 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
-    | 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.
-inline bool requiresCompositing(CompositingReasons reasons)
-{
-    return reasons & ~CompositingReasonComboSquashableReasons;
-}
-
-// If the layer has overlap or assumed overlap, but no other reasons, then it should be squashed.
-inline bool requiresSquashing(CompositingReasons reasons)
-{
-    return !requiresCompositing(reasons) && (reasons & CompositingReasonComboSquashableReasons);
-}
-
-struct CompositingReasonStringMap {
-    CompositingReasons reason;
-    const char* shortName;
-    const char* description;
-};
-
-PLATFORM_EXPORT extern const CompositingReasonStringMap kCompositingReasonStringMap[];
-PLATFORM_EXPORT extern size_t kNumberOfCompositingReasons;
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_PLATFORM_GRAPHICS_COMPOSITINGREASONS_H_