Enable resize and layout for frames with RemoteFrame ancestors

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index 7b92a473c6867e2f8537fd9ef9a0bed9223baf75..347739cb69e585ee17c57aa35246088f125cab29 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -314,6 +314,10 @@ public:
     // the page is shutting down, but will be valid at all other times.
     WebLocalFrameImpl* mainFrameImpl();
 
+    // FIXME: Temporary method to accommodate out-of-process frame ancestors;
+    // will be removed when there can be multiple WebWidgets for a single page.
+    WebLocalFrameImpl* localFrameRoot();

[dcheng, 2014/07/10 21:14:55]

I think we should name this something that discourages people from using it
while we're working on upstreaming stuff. Maybe randomLocalFrameRoot() to
reflect that it really just grabs a random one? Also, this should probably
return a reference if we can convince the compiler that we'll never fall out of
the for loop. It should be logically impossible to have zero local frames in a
frame tree.

[kenrb, 2014/07/11 16:06:18]

Is the last statement true even while the frame tree is being constructed? I
wasn't sure if there might be race conditions.

I have appended 'temporary' to the name to discourage use for other purposes.

+
     // Event related methods:
     void mouseContextMenu(const WebMouseEvent&);
     void mouseDoubleClick(const WebMouseEvent&);