Merge the Sky Engine changes from the SkyDart branch

sky/viewer/script/script_runner.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_VIEWER_SCRIPT_SCRIPT_RUNNER_H_
-#define SKY_VIEWER_SCRIPT_SCRIPT_RUNNER_H_
-
-#include "gin/runner.h"
-
-namespace blink {
-class WebFrame;
-}
-
-namespace sky {
-
-class ScriptRunner : public gin::Runner {
- public:
-  ScriptRunner(blink::WebFrame*, v8::Handle<v8::Context> context);
-  ~ScriptRunner();
-
-  virtual void Run(const std::string& source,
-                   const std::string& resource_name) override;
-  virtual v8::Handle<v8::Value> Call(v8::Handle<v8::Function> function,
-                                     v8::Handle<v8::Value> receiver,
-                                     int argc,
-                                     v8::Handle<v8::Value> argv[]) override;
-  virtual gin::ContextHolder* GetContextHolder() override;
-
- private:
-  blink::WebFrame* frame_;
-  gin::ContextHolder* context_holder_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScriptRunner);
-};
-
-}  // namespace sky
-
-#endif  // SKY_VIEWER_SCRIPT_SCRIPT_RUNNER_H_