Fix JSON serialization of PerformanceEntry subclasses

third_party/WebKit/Source/core/timing/PerformanceRenderTiming.cpp

 /*
  * Copyright (C) 2015 Google Inc. All rights reserved.
  * Copyright (C) 2015 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 13 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/timing/PerformanceRenderTiming.h"
 
+#include "bindings/core/v8/V8ObjectBuilder.h"
 #include "core/dom/Document.h"
 #include "core/loader/DocumentLoader.h"
 
 namespace blink {
 
 static double monotonicTimeToDocumentMilliseconds(Document* document, double seconds)
 {
     ASSERT(seconds >= 0.0);
     return document->loader()->timing().monotonicTimeToZeroBasedDocumentTime(seconds) * 1000.0;
 }
 
 PerformanceRenderTiming::PerformanceRenderTiming(Document* requestingDocument, unsigned sourceFrame, double startTime, double finishTime)
     : PerformanceEntry(requestingDocument->url().getString(), "render", monotonicTimeToDocumentMilliseconds(requestingDocument, startTime), monotonicTimeToDocumentMilliseconds(requestingDocument, finishTime))
     , m_sourceFrame(sourceFrame)
     , m_requestingDocument(requestingDocument)
 {
 }
 
 PerformanceRenderTiming::~PerformanceRenderTiming()
 {
 }
 
 unsigned PerformanceRenderTiming::sourceFrame() const
 {
     return m_sourceFrame;
 }
 
+void PerformanceRenderTiming::buildJSONValue(V8ObjectBuilder& builder) const
+{
+    PerformanceEntry::buildJSONValue(builder);
+    builder.addNumber("sourceFrame", sourceFrame());
+}
+
 DEFINE_TRACE(PerformanceRenderTiming)
 {
     visitor->trace(m_requestingDocument);
     PerformanceEntry::trace(visitor);
 }
 
 } // namespace blink