Add notifications for when V8Proxy creates or destroys a V8 Context.

webkit/glue/webframe_impl.cc

Index: webkit/glue/webframe_impl.cc
diff --git a/webkit/glue/webframe_impl.cc b/webkit/glue/webframe_impl.cc
index 3e418e788bdc6cfe10d2830b5020e85b0837ba29..9bc3e5601a42876bf4b551f0b02f30178c3f63bf 100644
--- a/webkit/glue/webframe_impl.cc
+++ b/webkit/glue/webframe_impl.cc
@@ -824,6 +824,17 @@ NPObject* WebFrameImpl::GetWindowNPObject() {
   return frame_->script()->windowScriptNPObject();
 }
 
+#if USE(V8)
+  // Returns the V8 context for this frame, or an empty handle if there is
+  // none.
+v8::Local<v8::Context> WebFrameImpl::GetScriptContext() {
+  if (!frame_)
+    return v8::Local<v8::Context>();
+
+  return frame_->script()->proxy()->GetContext();
+}
+#endif
+
 void WebFrameImpl::InvalidateArea(AreaToInvalidate area) {
   ASSERT(frame() && frame()->view());
 #if defined(OS_WIN) || defined(OS_LINUX)