[Extensions Bindings] Request JS execution from messaging bindings

extensions/renderer/api_event_handler.h

Index: extensions/renderer/api_event_handler.h
diff --git a/extensions/renderer/api_event_handler.h b/extensions/renderer/api_event_handler.h
index 13451d4b5cbec6f218d32cdd633b19d6f9659ed7..e3e4ce9c2f36198096717cd6b504dedbb7e0dfbf 100644
--- a/extensions/renderer/api_event_handler.h
+++ b/extensions/renderer/api_event_handler.h
@@ -75,9 +75,10 @@ class APIEventHandler {
                                 const std::string& event_name,
                                 v8::Local<v8::Function> function);
 
-  // Returns the EventListeners for a given |event_name| and |context|.
-  size_t GetNumEventListenersForTesting(const std::string& event_name,
-                                        v8::Local<v8::Context> context);
+  // Returns true if there is a listener for the given |event_name| in the
+  // given |context|.
+  bool HasListenerForEvent(const std::string& event_name,
+                           v8::Local<v8::Context> context);
 
   // Invalidates listeners for the given |context|. It's a shame we have to
   // have this separately (as opposed to hooking into e.g. a PerContextData
@@ -85,6 +86,10 @@ class APIEventHandler {
   // (because the associated extension ScriptContext needs to be valid).
   void InvalidateContext(v8::Local<v8::Context> context);
 
+  // Returns the EventListeners for a given |event_name| and |context|.

[lazyboy, 2017/06/05 18:18:32]

the number of EventListeners

[Devlin, 2017/06/09 20:18:02]

Done.

+  size_t GetNumEventListenersForTesting(const std::string& event_name,
+                                        v8::Local<v8::Context> context);
+
  private:
   // Method to run a given v8::Function. Curried in for testing.
   binding::RunJSFunction call_js_;