Fix unexpected blurry text caused by combination of skew and promotion

third_party/WebKit/Source/platform/graphics/CompositingReasons.cpp

 // 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.
 
 #include "platform/graphics/CompositingReasons.h"
 
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
@@ skipping 123 matching lines @@
      "composited layer tree"},
     {CompositingReasonLayerForScrollingBlockSelection,
      "layerForScrollingBlockSelection",
      "Secondary layer, to house block selection gaps for composited scrolling "
      "with no scrolling contents"},
     {CompositingReasonLayerForDecoration, "layerForDecoration",
      "Layer painted on top of other layers as decoration"},
     {CompositingReasonInlineTransform, "inlineTransform",
      "Has an inline transform, which causes subsequent layers to assume "
      "overlap"},
+    {CompositingReasonSkewWithCompositedSkewedAncestor,
+     "layerForSkewWithCompositedSkewedAncestor",
+     "Has skewed text in promoted skewed ancestor which causes blurriness "
+     "without separately compositing"},
 };
 
 const size_t kNumberOfCompositingReasons =
     WTF_ARRAY_LENGTH(kCompositingReasonStringMap);
 
 String compositingReasonsAsString(CompositingReasons reasons) {
   if (!reasons)
     return "none";
 
   StringBuilder builder;
   for (size_t i = 0; i < kNumberOfCompositingReasons; ++i) {
     if (reasons & kCompositingReasonStringMap[i].reason) {
       if (builder.length())
         builder.append(',');
       builder.append(kCompositingReasonStringMap[i].shortName);
     }
   }
   return builder.toString();
 }
 
 }  // namespace blink