Validation of extension api callback and event parameters in DEBUG

chrome/renderer/extensions/bindings_utils.h

Index: chrome/renderer/extensions/bindings_utils.h
diff --git a/chrome/renderer/extensions/bindings_utils.h b/chrome/renderer/extensions/bindings_utils.h
index 604cb2ca0d0de92be2c61421cde8397e3e88abbb..7354c7282cab5cb060f634a91d94518b7af169c2 100644
--- a/chrome/renderer/extensions/bindings_utils.h
+++ b/chrome/renderer/extensions/bindings_utils.h
@@ -106,10 +106,12 @@ RenderView* GetRenderViewForCurrentContext();
 
 // Call the named javascript function with the given arguments in a context.
 // The function name should be reachable from the chromeHidden object, and can
-// be a sub-property like "Port.dispatchOnMessage".
-void CallFunctionInContext(v8::Handle<v8::Context> context,
-                           const std::string& function_name, int argc,
-                           v8::Handle<v8::Value>* argv);
+// be a sub-property like "Port.dispatchOnMessage". Returns the result of 
+// the function call. If an exception is thrown an empty Handle will be
+// returned.
+v8::Handle<v8::Value> CallFunctionInContext(v8::Handle<v8::Context> context,
+    const std::string& function_name, int argc,
+    v8::Handle<v8::Value>* argv);
 
 }  // namespace bindings_utils