Allow virtual keyboard window to access audio stream and speech api for voice input

ui/keyboard/keyboard_controller_proxy.h

 // 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 UI_KEYBOARD_KEYBOARD_CONTROLLER_PROXY_H_
 #define UI_KEYBOARD_KEYBOARD_CONTROLLER_PROXY_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "content/public/common/media_stream_request.h"
 #include "ui/keyboard/keyboard_export.h"
 
 namespace aura {
 class Window;
 }
 namespace content {
 class BrowserContext;
 class SiteInstance;
 class WebContents;
 }
@@ skipping 14 matching lines @@
   virtual ~KeyboardControllerProxy();
 
   // Gets the virtual keyboard window.  Ownership of the returned Window remains
   // with the proxy.
   virtual aura::Window* GetKeyboardWindow();
 
   // Gets the InputMethod that will provide notifications about changes in the
   // text input context.
   virtual ui::InputMethod* GetInputMethod() = 0;
 
+  // Requests the audio input from microphone for speech input.
+  virtual void RequestAudioInput(content::WebContents* web_contents,
+      const content::MediaStreamRequest& request,
+      const content::MediaResponseCallback& callback) = 0;
+
   // Shows the container window of the keyboard. The default implementation
   // simply shows the container. An overridden implementation can set up
   // necessary animation, or delay the visibility change as it desires.
   virtual void ShowKeyboardContainer(aura::Window* container);
 
   // Hides the container window of the keyboard. The default implementation
   // simply hides the container. An overridden implementation can set up
   // necesasry animation, or delay the visibility change as it desires.
   virtual void HideKeyboardContainer(aura::Window* container);
 
@@ skipping 10 matching lines @@
 
  private:
   scoped_ptr<content::WebContents> keyboard_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardControllerProxy);
 };
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_CONTROLLER_PROXY_H_