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

chrome/browser/speech/speech_input_manager.h

Index: chrome/browser/speech/speech_input_manager.h
diff --git a/chrome/browser/speech/speech_input_manager.h b/chrome/browser/speech/speech_input_manager.h
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+++ b/chrome/browser/speech/speech_input_manager.h
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+// 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_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_
+#define CHROME_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_
+
+#include "base/basictypes.h"
+#include "base/ref_counted.h"
+#include "ipc/ipc_message.h"
+
+namespace speech_input {
+
+// This is the gatekeeper for speech recognition in the browser process. It
+// handles requests received from various render views and makes sure only one
+// of them can use speech recognition at a time. It also sends recognition
+// results and status events to the render views when required.
+class SpeechInputManager {
+ public:
+  // Implemented by the dispatcher host to relay events to the render views.
+  class Listener {
+  public:
+    virtual void SetRecognitionResult(int render_view_id,
+                                      const string16& value) = 0;
+    virtual void DidCompleteRecording(int render_view_id) = 0;
+    virtual void DidCompleteRecognition(int render_view_id) = 0;
+  };
+
+  // Factory method to create new instances.
+  static SpeechInputManager* Create(Listener* listener);
+  // Factory method definition useful for tests.
+  typedef SpeechInputManager* (FactoryMethod)(Listener*);
+
+  virtual ~SpeechInputManager() {}
+
+  // Handlers for requests from render views.
+  virtual void StartRecognition(int render_view_id)  = 0;
+  virtual void CancelRecognition(int render_view_id) = 0;
+  virtual void StopRecording(int render_view_id) = 0;
+};
+
+}  // namespace speech_input
+
+#endif  // CHROME_BROWSER_SPEECH_SPEECH_INPUT_MANAGER_H_