Make load events in iframe elements work with OOPIF (Blink side).

public/web/WebRemoteFrame.h

Index: public/web/WebRemoteFrame.h
diff --git a/public/web/WebRemoteFrame.h b/public/web/WebRemoteFrame.h
index f5ecbf25713199bb83a58f3f80201e3c1bad7896..df7ee82edfdc6e533524511bd92d86f79af120e9 100644
--- a/public/web/WebRemoteFrame.h
+++ b/public/web/WebRemoteFrame.h
@@ -35,6 +35,8 @@ public:
     // Set frame name replicated from another process.
     virtual void setReplicatedName(const WebString&) const = 0;
 
+    virtual void DispatchFrameOwnerLoadEvent() const = 0;

[dcheng, 2015/02/24 20:11:05]

dispatchLoadEventForFrameOwner() might be a bit more consistent with how things
in the Blink API layer are named.

As an aside, it feels like it should be possible to integrate this somehow with
the didStart/didStopLoading stuff, but the current structure is fine.

[alexmos, 2015/02/24 20:56:23]

Done.

I can double-check with Nasko about didStart/didStopLoading.  I noticed that
FrameOwner::dispatchLoad is also dispatched when the load is canceled because of
XFO or CSP, so it may not be exactly the same.

+
     virtual void didStartLoading() = 0;
     virtual void didStopLoading() = 0;
 };