Adds chromium side plumbing to pass speech input calls back and forth with WebKit.

chrome/renderer/speech_input_dispatcher.h

+// Copyright (c) 2010 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 CHROME_RENDERER_SPEECH_INPUT_DISPATCHER_H_
+#define CHROME_RENDERER_SPEECH_INPUT_DISPATCHER_H_
+
+#include "base/basictypes.h"
+#include "ipc/ipc_message.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebSpeechInputController.h"
+
+class GURL;
+class RenderView;
+
+namespace WebKit {
+class WebSpeechInputListener;
+}
+
+// SpeechInputDispatcher is a delegate for speech input messages used by WebKit.
+// It's the complement of SpeechInputDispatcherHost (owned by RenderViewHost).
+class SpeechInputDispatcher : public WebKit::WebSpeechInputController {
+ public:
+  SpeechInputDispatcher(RenderView* render_view,
+                        WebKit::WebSpeechInputListener* listener);
+
+  // Called to possibly handle the incoming IPC message. Returns true if
+  // handled. Called in render thread.
+  bool OnMessageReceived(const IPC::Message& msg);
+
+  // WebKit::WebSpeechInputController.
+  bool startRecognition();
+  void cancelRecognition();
+  void stopRecording();
+
+ private:
+  void OnSpeechRecognitionResult(const string16& result);
+  void OnSpeechRecordingComplete();
+  void OnSpeechRecognitionComplete();
+
+  RenderView* render_view_;
+  WebKit::WebSpeechInputListener* listener_;
+
+  DISALLOW_COPY_AND_ASSIGN(SpeechInputDispatcher);
+};
+
+#endif  // CHROME_RENDERER_SPEECH_INPUT_DISPATCHER_H_