Revert of Revert of Make start/stop loading notifications per-frame

Source/web/FrameLoaderClientImpl.h

Index: Source/web/FrameLoaderClientImpl.h
diff --git a/Source/web/FrameLoaderClientImpl.h b/Source/web/FrameLoaderClientImpl.h
index b08e6a01b069b56061400a81a04c688708b89415..ef97bd701e467dcc388ec1c3e3ad7b3ca26cf927 100644
--- a/Source/web/FrameLoaderClientImpl.h
+++ b/Source/web/FrameLoaderClientImpl.h
@@ -98,9 +98,9 @@
     virtual void dispatchWillRequestResource(WebCore::FetchRequest*) OVERRIDE;
     virtual void dispatchWillSendSubmitEvent(WebCore::HTMLFormElement*) OVERRIDE;
     virtual void dispatchWillSubmitForm(WebCore::HTMLFormElement*) OVERRIDE;
-    virtual void postProgressStartedNotification(WebCore::LoadStartType) OVERRIDE;
-    virtual void postProgressEstimateChangedNotification() OVERRIDE;
-    virtual void postProgressFinishedNotification() OVERRIDE;
+    virtual void didStartLoading(WebCore::LoadStartType) OVERRIDE;
+    virtual void didStopLoading() OVERRIDE;
+    virtual void progressEstimateChanged(double progressEstimate) OVERRIDE;
     virtual void loadURLExternally(const WebCore::ResourceRequest&, WebCore::NavigationPolicy, const String& suggestedName = String()) OVERRIDE;
     virtual bool navigateBackForward(int offset) const OVERRIDE;
     virtual void didAccessInitialDocument() OVERRIDE;