Move squash preventing reasons out of compositing reasons

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

Index: third_party/WebKit/Source/platform/graphics/GraphicsLayerDebugInfo.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/GraphicsLayerDebugInfo.cpp b/third_party/WebKit/Source/platform/graphics/GraphicsLayerDebugInfo.cpp
index 3820b8a536e2fe648467901518c5f9c07d30c511..b46bcad0239da2581e4db6080d33d121b2d435d8 100644
--- a/third_party/WebKit/Source/platform/graphics/GraphicsLayerDebugInfo.cpp
+++ b/third_party/WebKit/Source/platform/graphics/GraphicsLayerDebugInfo.cpp
@@ -25,6 +25,7 @@ namespace blink {
 
 GraphicsLayerDebugInfo::GraphicsLayerDebugInfo()
     : m_compositingReasons(CompositingReasonNone)
+    , m_squashingDisallowedReasons(SquashingDisallowedReasonsNone)
     , m_ownerNodeId(0)
 {
 }
@@ -36,6 +37,7 @@ scoped_refptr<base::trace_event::TracedValue> GraphicsLayerDebugInfo::asTracedVa
     scoped_refptr<base::trace_event::TracedValue> tracedValue = new base::trace_event::TracedValue;
     appendAnnotatedInvalidateRects(tracedValue.get());
     appendCompositingReasons(tracedValue.get());
+    appendSquashingDisallowedReasons(tracedValue.get());
     appendOwnerNodeId(tracedValue.get());
     return tracedValue;
 }
@@ -69,6 +71,17 @@ void GraphicsLayerDebugInfo::appendCompositingReasons(base::trace_event::TracedV
     tracedValue->EndArray();
 }
 
+void GraphicsLayerDebugInfo::appendSquashingDisallowedReasons(base::trace_event::TracedValue* tracedValue) const
+{
+    tracedValue->BeginArray("squashing_disallowed_reasons");
+    for (size_t i = 0; i < kNumberOfSquashingDisallowedReasons; ++i) {
+        if (!(m_compositingReasons & kSquashingDisallowedReasonStringMap[i].reason))
+            continue;
+        tracedValue->AppendString(kSquashingDisallowedReasonStringMap[i].description);
+    }
+    tracedValue->EndArray();
+}
+
 void GraphicsLayerDebugInfo::appendOwnerNodeId(base::trace_event::TracedValue* tracedValue) const
 {
     if (!m_ownerNodeId)