Introduce DevToolsExternalAgentProxy interface

content/browser/devtools/devtools_external_agent_proxy_impl.h

Index: content/browser/devtools/devtools_external_agent_proxy_impl.h
diff --git a/content/browser/devtools/devtools_external_agent_proxy_impl.h b/content/browser/devtools/devtools_external_agent_proxy_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..39f40dfd2ccaa9a1887c6b3a6df9fcd3a270c572
--- /dev/null
+++ b/content/browser/devtools/devtools_external_agent_proxy_impl.h
@@ -0,0 +1,34 @@
+// Copyright (c) 2013 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_BROWSER_DEVTOOLS_DEVTOOLS_EXTERNAL_AGENT_PROXY_IMPL_H
+#define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_EXTERNAL_AGENT_PROXY_IMPL_H
+
+#include "base/memory/ref_counted.h"
+#include "content/public/browser/devtools_external_agent_proxy.h"
+
+namespace content {
+
+class DevToolsExternalAgentProxyImpl
+    : public DevToolsExternalAgentProxy {
+ public:
+  explicit DevToolsExternalAgentProxyImpl(
+      DevToolsExternalAgentProxyDelegate* delegate);
+  virtual ~DevToolsExternalAgentProxyImpl();
+
+  // DevToolsExternalAgentProxy implementation.
+  virtual scoped_refptr<DevToolsAgentHost> GetAgentHost() OVERRIDE;
+  virtual void ConnectionClosed() OVERRIDE;
+
+ private:
+  class ForwardingAgentHost;
+
+  scoped_refptr<ForwardingAgentHost> agent_host_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevToolsExternalAgentProxyImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_EXTERNAL_AGENT_PROXY_IMPL_H