[Extensions] Consolidate ExtensionFunction::SendResponse()s

extensions/browser/quota_service_unittest.cc

Index: extensions/browser/quota_service_unittest.cc
diff --git a/extensions/browser/quota_service_unittest.cc b/extensions/browser/quota_service_unittest.cc
index f44d0b9eb5cec40f57946bee7666fa822e6369f5..646be96015f1bb4b81136dce1644baf7d35567e0 100644
--- a/extensions/browser/quota_service_unittest.cc
+++ b/extensions/browser/quota_service_unittest.cc
@@ -70,7 +70,6 @@ class MockFunction : public ExtensionFunction {
   void SetError(const std::string& error) override {}
   void Destruct() const override { delete this; }
   ResponseAction Run() override { return RespondLater(); }
-  void SendResponse(bool) override {}
 
  protected:
   ~MockFunction() override {}