Add didCreateNewDocument() notification

Source/core/loader/FrameLoaderClient.h

Index: Source/core/loader/FrameLoaderClient.h
diff --git a/Source/core/loader/FrameLoaderClient.h b/Source/core/loader/FrameLoaderClient.h
index 895175bf7b1904d64bb511411f8f87a97f6cd14f..d77eb884c1d8768a5477ef2ace625e57741f03c8 100644
--- a/Source/core/loader/FrameLoaderClient.h
+++ b/Source/core/loader/FrameLoaderClient.h
@@ -160,6 +160,7 @@ namespace blink {
         virtual ObjectContentType objectContentType(const KURL&, const String& mimeType, bool shouldPreferPlugInsForImages) = 0;
 
         virtual void dispatchDidClearWindowObjectInMainWorld() = 0;
+        virtual void dispatchWillReplaceDocumentWhileExecutingJavaScriptURL() = 0;

[Nate Chapin, 2014/11/06 17:27:37]

This feels hacky. I'd feel much better about a didCreateNewDocument() or
similar, called from FrameLoader::didBeginDocument(). That should cover all
cases when the document changes, which would allow the code in the chromium repo
to only InvalidateFrame() in one place (doing so in DidStartProvisionalLoad
feels hacky as well).

[robwu, 2014/11/06 18:13:08]

Done. We will still use two InvalidateFrame() calls though: the new
DidCreateNewDocument plus FrameDetached().

         virtual void documentElementAvailable() = 0;
 
         virtual void didCreateScriptContext(v8::Handle<v8::Context>, int extensionGroup, int worldId) = 0;