mix-blend-mode implementation for accelerated layers

cc/layers/compositing_reasons.h

 // Copyright 2013 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 CC_LAYERS_COMPOSITING_REASONS_H_
 #define CC_LAYERS_COMPOSITING_REASONS_H_
 
 #include "base/port.h"
 
 namespace cc {
@@ skipping 35 matching lines @@
 const uint64 kCompositingReasonRoot = GG_UINT64_C(1) << 25;
 const uint64 kCompositingReasonLayerForClip = GG_UINT64_C(1) << 26;
 const uint64 kCompositingReasonLayerForScrollbar = GG_UINT64_C(1) << 27;
 const uint64 kCompositingReasonLayerForScrollingContainer =
     GG_UINT64_C(1) << 28;
 const uint64 kCompositingReasonLayerForForeground = GG_UINT64_C(1) << 29;
 const uint64 kCompositingReasonLayerForBackground = GG_UINT64_C(1) << 30;
 const uint64 kCompositingReasonLayerForMask = GG_UINT64_C(1) << 31;
 const uint64 kCompositingReasonOverflowScrollingParent = GG_UINT64_C(1) << 32;
 const uint64 kCompositingReasonOutOfFlowClipping = GG_UINT64_C(1) << 33;
+const uint64 kCompositingReasonIsolateCompositedDescendants = GG_UINT64_C(1)

[danakj, 2013/11/13 21:02:03]

nit: this line wrapping differs from the rest of this file, was this via
clang-format? if not, can you match the others?

[rosca, 2013/11/14 21:56:34]

Yes, it's clang-format suggesting this, but I think we should keep them
consistent.
Done.

+                                                              << 35;
 
 typedef uint64 CompositingReasons;
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_COMPOSITING_REASONS_H_