Support sharing of ContentMain and BrowserMain code with embedded use cases (try #3).

content/public/browser/browser_main_runner.h

+// Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_BROWSER_MAIN_RUNNER_H_
+#define CONTENT_PUBLIC_BROWSER_BROWSER_MAIN_RUNNER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+struct MainFunctionParams;
+
+// This class is responsible for browser initialization, running and shutdown.
+class BrowserMainRunner {
+ public:
+  virtual ~BrowserMainRunner() {}
+
+  // Create a new BrowserMainRunner object.
+  static BrowserMainRunner* Create();
+
+  // Initialize all necessary browser state. The |parameters| values will be
+  // copied.
+  virtual int Initialize(const content::MainFunctionParams& parameters) = 0;
+
+  // Perform the default run logic.
+  virtual int Run() = 0;
+
+  // Shut down the browser state.
+  virtual void Shutdown() = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_BROWSER_MAIN_RUNNER_H_