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

chrome/renderer/extensions/event_bindings.h

Index: chrome/renderer/extensions/event_bindings.h
diff --git a/chrome/renderer/extensions/event_bindings.h b/chrome/renderer/extensions/event_bindings.h
index 0ca59c036e5463c410aab0e9e76792a8db882993..a026c198cb399c3e4649857ed346f77ed4e24c31 100644
--- a/chrome/renderer/extensions/event_bindings.h
+++ b/chrome/renderer/extensions/event_bindings.h
@@ -10,6 +10,7 @@
 #include <string>
 
 class RenderThreadBase;
+class WebFrame;
 
 // This class deals with the javascript bindings related to Event objects.
 class EventBindings {
@@ -20,6 +21,10 @@ class EventBindings {
   // Allow RenderThread to be mocked out.
   static void SetRenderThread(RenderThreadBase* thread);
 
+  // Handle a script context coming / going away.
+  static void HandleContextCreated(WebFrame* frame);
+  static void HandleContextDestroyed(WebFrame* frame);
+
   // Calls the given function in each registered context which is listening
   // for events.  The function can be an object property, ie:
   // "chromium.Event.dispatch_".