Refactor WindowProxy into Local and Remote subclasses.

third_party/WebKit/Source/core/frame/LocalFrame.h

Index: third_party/WebKit/Source/core/frame/LocalFrame.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.h b/third_party/WebKit/Source/core/frame/LocalFrame.h
index da62177aeabab49db8943344be18308a28f0f0c6..2b8671ed8b6b2cc82af45e39243850034f3d5263 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -236,7 +236,7 @@ class CORE_EXPORT LocalFrame final : public Frame,
              InterfaceRegistry*);
 
   // Internal Frame helper overrides:
-  WindowProxyManager* getWindowProxyManager() const override;
+  WindowProxyManagerBase* getWindowProxyManager() const override;

[Yuki, 2017/01/11 10:09:24]

nit: Why not LocalWindowProxyManager?

[dcheng, 2017/01/11 10:35:29]

This is an override. I can't include WindowProxyManager.h here, due to include
cycles. Since it doesn't need to be covariant, I just return the base type for
simplicity.

   // Intentionally private to prevent redundant checks when the type is
   // already LocalFrame.
   bool isLocalFrame() const override { return true; }