Replace references to MediaStreamTrack.getSources() with enumerateDevices() in PPAPI.

ppapi/api/private/ppb_camera_device_private.idl

 /* Copyright 2014 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.
  */
 
 /**
  * Defines the <code>PPB_CameraDevice_Private</code> interface. Used for
  * manipulating a camera device.
  */
 
@@ skipping 33 matching lines @@
    * otherwise.
    */
   PP_Bool IsCameraDevice([in] PP_Resource resource);
 
   /**
    * Opens a camera device.
    *
    * @param[in] camera_device A <code>PP_Resource</code> corresponding to a
    * camera device resource.
    * @param[in] device_id A <code>PP_Var</code> identifying a camera device. The
-   * type is string. The ID can be obtained from MediaStreamTrack.getSources()
-   * or MediaStreamVideoTrack.id.
+   * type is string. The ID can be obtained from
+   * navigator.mediaDevices.enumerateDevices() or MediaStreamVideoTrack.id.
    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
    * completion of <code>Open()</code>.
    *
    * @return An error code from <code>pp_errors.h</code>.
    */
   int32_t Open(
       [in] PP_Resource camera_device,
       [in] PP_Var device_id,
       [in] PP_CompletionCallback callback);
 
@@ skipping 21 matching lines @@
    * be changed.
    * @param[in] callback <code>PP_CompletionCallback</code> to be called upon
    * completion of <code>GetCameraCapabilities()</code>.
    *
    * @return An int32_t containing a result code from <code>pp_errors.h</code>.
    */
   int32_t GetCameraCapabilities([in] PP_Resource camera_device,
                                 [out] PP_Resource capabilities,
                                 [in] PP_CompletionCallback callback);
 };