Update for changes to devtools in Chrome 31

browser/devtools_embedder_message_dispatcher.* came from
chrome/browser/devtools, and were modified just enough to compile within
brightray.

brightray/browser/devtools_embedder_message_dispatcher.h

@@ -0,0 +1,68 @@
+// Copyright 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-CHROMIUM file.
+
+#ifndef BRIGHTRAY_BROWSER_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_
+#define BRIGHTRAY_BROWSER_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_
+
+#include <map>
+#include <string>
+
+#include "base/callback.h"
+
+namespace base {
+class ListValue;
+}
+
+namespace brightray {
+
+/**
+ * Dispatcher for messages sent from the DevTools frontend running in an
+ * isolated renderer (on chrome-devtools://) to the embedder in the browser.
+ *
+ * The messages are sent via InspectorFrontendHost.sendMessageToEmbedder method.
+ */
+class DevToolsEmbedderMessageDispatcher {
+ public:
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    virtual void ActivateWindow() = 0;
+    virtual void CloseWindow() = 0;
+    virtual void MoveWindow(int x, int y) = 0;
+    virtual void SetDockSide(const std::string& side) = 0;
+    virtual void OpenInNewTab(const std::string& url) = 0;
+    virtual void SaveToFile(const std::string& url,
+                            const std::string& content,
+                            bool save_as) = 0;
+    virtual void AppendToFile(const std::string& url,
+                              const std::string& content) = 0;
+    virtual void RequestFileSystems() = 0;
+    virtual void AddFileSystem() = 0;
+    virtual void RemoveFileSystem(const std::string& file_system_path) = 0;
+    virtual void IndexPath(int request_id,
+                           const std::string& file_system_path) = 0;
+    virtual void StopIndexing(int request_id) = 0;
+    virtual void SearchInPath(int request_id,
+                              const std::string& file_system_path,
+                              const std::string& query) = 0;
+  };
+
+  explicit DevToolsEmbedderMessageDispatcher(Delegate* delegate);
+
+  ~DevToolsEmbedderMessageDispatcher();
+
+  void Dispatch(const std::string& message);
+
+ private:
+  typedef base::Callback<bool (const base::ListValue&)> Handler;
+  void RegisterHandler(const std::string& method, const Handler& handler);
+
+  typedef std::map<std::string, Handler> HandlerMap;
+  HandlerMap handlers_;
+};
+
+}  // namespace brightray
+
+#endif  // BRIGHTRAY_BROWSER_DEVTOOLS_EMBEDDER_MESSAGE_DISPATCHER_H_