Refactor WindowProxy into Local and Remote subclasses.

third_party/WebKit/Source/core/frame/RemoteFrame.cpp

Index: third_party/WebKit/Source/core/frame/RemoteFrame.cpp
diff --git a/third_party/WebKit/Source/core/frame/RemoteFrame.cpp b/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
index 558aed7e956e07363603fffee4ddc80e5ebdc11c..c9c83df324d193830b541a5d379d2fa9b3f58416 100644
--- a/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
+++ b/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
@@ -30,7 +30,7 @@ inline RemoteFrame::RemoteFrame(RemoteFrameClient* client,
                                 FrameOwner* owner)
     : Frame(client, host, owner),
       m_securityContext(RemoteSecurityContext::create()),
-      m_windowProxyManager(WindowProxyManager::create(*this)) {
+      m_windowProxyManager(RemoteWindowProxyManager::create(*this)) {
   m_domWindow = RemoteDOMWindow::create(*this);
 }
 
@@ -187,6 +187,10 @@ void RemoteFrame::advanceFocus(WebFocusType type, LocalFrame* source) {
   client()->advanceFocus(type, source);
 }
 
+WindowProxyManagerBase* RemoteFrame::getWindowProxyManager() const {
+  return m_windowProxyManager.get();
+}
+
 void RemoteFrame::detachChildren() {
   using FrameVector = HeapVector<Member<Frame>>;
   FrameVector childrenToDetach;