Make reftests work for sky.

sky/tools/tester/test_harness_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SKY_TOOLS_TESTER_TEST_HARNESS_IMPL_H_
 #define SKY_TOOLS_TESTER_TEST_HARNESS_IMPL_H_
 
 #include "base/memory/weak_ptr.h"
 #include "mojo/public/cpp/application/interface_factory_impl.h"
 #include "mojo/public/cpp/system/core.h"
 #include "sky/services/testing/test_harness.mojom.h"
 
 namespace sky {
 namespace tester {
 class TestRunner;
 
 class TestHarnessImpl : public mojo::InterfaceImpl<TestHarness> {
  public:
   explicit TestHarnessImpl(TestRunner*);
   virtual ~TestHarnessImpl();
 
  private:
   // TestHarness implementation.
-  void OnTestComplete(const mojo::String& test_result) override;
+  void OnTestComplete(const mojo::String& test_result,
+    const mojo::String& pixels) override;
   void DispatchInputEvent(mojo::EventPtr event) override;
 
   base::WeakPtr<TestRunner> test_runner_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(TestHarnessImpl);
 };
 
 typedef mojo::InterfaceFactoryImplWithContext<
     TestHarnessImpl, TestRunner> TestHarnessFactory;
 
 }  // namespace tester
 }  // namespace sky
 
 #endif  // SKY_TOOLS_TESTER_TEST_HARNESS_IMPL_H_