Move all ProvisionFetcher classes out of android/ subdirectories.

media/mojo/interfaces/provision_fetcher.mojom

 // Copyright 2015 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.
 
 module media.mojom;
 
-// An interface to retrieve provision information for Android MediaDrm.
-// See Android documentation about MediaDrm provisioning:
+// An interface to retrieve provision information for CDM. This includes Android
+// MediaDrm. See Android documentation about MediaDrm provisioning:
 // https://developer.android.com/reference/android/media/MediaDrm.ProvisionRequest.html
 
 interface ProvisionFetcher {
   // Requests the provision information with |default_url| and |request_data|
-  // and returns |result| and the |response|. The input parameters |default_url|
-  // and |request_data| corresponds to Java class MediaDrm.ProvisionRequest.
-  // |response| will be empty iff |result| is false.
+  // and returns |result| and the |response|. On Android, the input parameters
+  // |default_url| and |request_data| corresponds to Java class
+  // MediaDrm.ProvisionRequest. |response| will be empty iff |result| is false.
+  // TODO(slan): Pass |default_url| as a url.mojom.Url (crbug.com/662752).
   Retrieve(string default_url, string request_data)
       => (bool result, string response);
 };