NOCOMMIT: Blink tracing now uses base

third_party/WebKit/Source/core/layout/LayoutAnalyzer.cpp

Index: third_party/WebKit/Source/core/layout/LayoutAnalyzer.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutAnalyzer.cpp b/third_party/WebKit/Source/core/layout/LayoutAnalyzer.cpp
index b1b510de7454f14564588947fc85825b2d74e097..b64aa6e89eb6f0347cfa8145f34efd089ba3a311 100644
--- a/third_party/WebKit/Source/core/layout/LayoutAnalyzer.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutAnalyzer.cpp
@@ -105,14 +105,14 @@ void LayoutAnalyzer::pop(const LayoutObject& o)
     --m_depth;
 }
 
-PassRefPtr<TracedValue> LayoutAnalyzer::toTracedValue()
+scoped_refptr<TracedValue> LayoutAnalyzer::toTracedValue()
 {
-    RefPtr<TracedValue> tracedValue(TracedValue::create());
+    scoped_refptr<TracedValue> tracedValue(TracedValue::create());
     for (size_t i = 0; i < NumCounters; ++i) {
         if (m_counters[i] > 0)
             tracedValue->setInteger(nameForCounter(static_cast<Counter>(i)), m_counters[i]);
     }
-    return tracedValue.release();
+    return tracedValue;
 }
 
 const char* LayoutAnalyzer::nameForCounter(Counter counter) const