Client Side Speed Index

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

Index: third_party/WebKit/Source/core/timing/PerformanceTiming.cpp
diff --git a/third_party/WebKit/Source/core/timing/PerformanceTiming.cpp b/third_party/WebKit/Source/core/timing/PerformanceTiming.cpp
index 30688fbc61bf5201c09ef8867c9f57645f7f6b3f..4acf089e57790425fe2d699749b14bc8d393c73b 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceTiming.cpp
+++ b/third_party/WebKit/Source/core/timing/PerformanceTiming.cpp
@@ -352,6 +352,21 @@ unsigned long long PerformanceTiming::firstImagePaint() const
     return monotonicTimeToIntegerMilliseconds(timing->firstImagePaint());
 }
 
+double PerformanceTiming::speedIndex() const
+{
+    const PaintTiming* paintTime = paintTiming();
+    DocumentLoadTiming* loadTime = documentLoadTiming();
+    if (!paintTime || !loadTime)
+        return 0;
+
+    double navigationStart = loadTime->navigationStart();
+    if (!navigationStart)
+        return 0;
+
+    double speedIndex = paintTime->speedIndex(navigationStart);
+    return speedIndex;
+}
+
 DocumentLoader* PerformanceTiming::documentLoader() const
 {
     if (!m_frame)