Observing DocumentTiming and sending data to RenderFrameImpl

Source/core/dom/DocumentTiming.h

Index: Source/core/dom/DocumentTiming.h
diff --git a/Source/core/dom/DocumentTiming.h b/Source/core/dom/DocumentTiming.h
index 7804c42d230917be93f6da518e4f9a2e92beb4ff..b1dea1db3deab987c59e33a908e10a16ea91b48b 100644
--- a/Source/core/dom/DocumentTiming.h
+++ b/Source/core/dom/DocumentTiming.h
@@ -28,9 +28,16 @@
 
 namespace blink {
 
+class Document;
+
 class DocumentTiming {
 public:
-    DocumentTiming();
+    class Observer {
+    public:
+        virtual void onDocumentTimingChanged() const = 0;

[Bryan McQuade, 2015/08/14 15:14:16]

conceptually this is a const method, but i tend to shy away from making
interface methods const because it's hard to know whether the implementations of
the interfaces will truly be able to satisfy the constness. so i'd be inclined
to drop const here.

[Bryan McQuade, 2015/08/14 15:23:24]

On second thought, I'm totally ok with this being const. Up to you.

+    };
+
+    DocumentTiming(Observer* document);
 
     void markDomLoading();
     void markDomInteractive();
@@ -47,12 +54,16 @@ public:
     double firstLayout() const { return m_firstLayout; }
 
 private:
+    void notifyDocumentTimingChanged();
+
     double m_domLoading;
     double m_domInteractive;
     double m_domContentLoadedEventStart;
     double m_domContentLoadedEventEnd;
     double m_domComplete;
     double m_firstLayout;
+
+    Observer* m_observer;
 };
 
 }