Hook up postMessages to WebRemoteFrameClient

Source/core/frame/FrameClient.h

Index: Source/core/frame/FrameClient.h
diff --git a/Source/core/frame/FrameClient.h b/Source/core/frame/FrameClient.h
index 22eef163f170a6d858af69212ce1fcf831014b26..3d388af7e400acfa0dedc1363c59a1455bb4e504 100644
--- a/Source/core/frame/FrameClient.h
+++ b/Source/core/frame/FrameClient.h
@@ -8,6 +8,9 @@
 namespace blink {
 
 class Frame;
+class LocalFrame;
+class MessageEvent;
+class SecurityOrigin;
 
 class FrameClient {
 public:
@@ -21,6 +24,9 @@ public:
     virtual Frame* firstChild() const = 0;
     virtual Frame* lastChild() const = 0;
 
+    // Returns true if the embedder intercepted the postMessage call
+    virtual bool willCheckAndDispatchMessageEvent(SecurityOrigin* /*target*/, MessageEvent*, LocalFrame* /*sourceFrame*/) const { return false; }
+
     virtual ~FrameClient() { }
 };