Added support for multiple parameters to Extension API callbacks.

chrome/browser/extensions/api/debugger/debugger_api.cc

Index: chrome/browser/extensions/api/debugger/debugger_api.cc
diff --git a/chrome/browser/extensions/api/debugger/debugger_api.cc b/chrome/browser/extensions/api/debugger/debugger_api.cc
index d1c960cad8e6693c1bfbe810687818e3a030cfc4..77ba8cd473a0b31d26af9d4826ea225b98d2e7af 100644
--- a/chrome/browser/extensions/api/debugger/debugger_api.cc
+++ b/chrome/browser/extensions/api/debugger/debugger_api.cc
@@ -484,8 +484,8 @@ void SendCommandDebuggerFunction::SendResponseBody(
 
   Value* result_body;
   if (dictionary->Get("result", &result_body))
-    result_.reset(result_body->DeepCopy());
+    SetResult(result_body->DeepCopy());
   else
-    result_.reset(new DictionaryValue());
+    SetResult(new DictionaryValue());
   SendResponse(true);
 }