Move window.close implementation to DOMWindow

Source/web/RemoteFrameClientImpl.cpp

Index: Source/web/RemoteFrameClientImpl.cpp
diff --git a/Source/web/RemoteFrameClientImpl.cpp b/Source/web/RemoteFrameClientImpl.cpp
index a2994e71cb2f15f2ddc09e27d439474fba297eb6..7dd5bf9014a7ff19d40afb4aa76231cc7fc392d7 100644
--- a/Source/web/RemoteFrameClientImpl.cpp
+++ b/Source/web/RemoteFrameClientImpl.cpp
@@ -110,6 +110,12 @@ void RemoteFrameClientImpl::reload(ReloadPolicy reloadPolicy, ClientRedirectPoli
         m_webFrame->client()->reload(reloadPolicy == EndToEndReload, clientRedirectPolicy == ClientRedirect);
 }
 
+void RemoteFrameClientImpl::close()
+{
+    if (m_webFrame->client())
+        m_webFrame->client()->close();
+}
+
 // FIXME: Remove this code once we have input routing in the browser
 // process. See http://crbug.com/339659.
 void RemoteFrameClientImpl::forwardInputEvent(Event* event)