arc: IPC method to set custom wallpaper.

components/arc/common/intent_helper.mojom

 // Copyright 2016 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.
+//
+// Next MinVersion: 9
 
-// Next MinVersion: 8
 module arc.mojom;
 
 import "scale_factor.mojom";
 
 // Describes the type of action to invoke.
 enum ActionType {
   VIEW,
   SEND,
   SEND_MULTIPLE,
 };
@@ skipping 21 matching lines @@
   array<uint8> icon;  // in BGRA8888 format
 };
 
 // URL associated with its mime type.
 struct UrlWithMimeType {
   string url;
   string mime_type;
 };
 
 // Handles intents from ARC in Chrome.
-// Next method ID: 4
+// Next method ID: 5
 interface IntentHelperHost {
   // Called when icons associated with the package are no longer up to date.
   [MinVersion=3] OnIconInvalidated@1(string package_name);
 
   // Opens the downloads directory in the Chrome OS file manager.
   [MinVersion=5] OnOpenDownloads@2();
 
   // Opens the url with Chrome for Chrome OS.
   OnOpenUrl@0(string url);
 
   // Opens the wallpaper picker dialog.
   [MinVersion=6] OpenWallpaperPicker@3();
+
+  // Sets an image as the wallpaper.
+  // |jpeg_data| is a JPEG encoded wallpaper image.
+  [MinVersion=8] SetWallpaper@4(array<uint8> jpeg_data);
 };
 
 // Sends intents to ARC on behalf of Chrome.
 // Next method ID: 9
 interface IntentHelperInstance {
 
   // Sets the given package as a preferred package. The next time an ACTION_VIEW
   // intent is sent with a URL that requires disambiguation, instead of opening
   // the ResolverActivity, this package will be picked if it is on the list.
   // When multiple packages are set as preferred, the most recent setting wins.
@@ skipping 34 matching lines @@
   // specified.  Data can be sent as extras by including a JSON map string which
   // will be automatically converted to a bundle accessible by the receiver.
   //
   // Note: Broadcasts can only be sent to whitelisted packages.  Packages can be
   // added to the whitelist in ArcBridgeService.java in the Android source.
   [MinVersion=1] SendBroadcast@1(string action,
                                  string package_name,
                                  string cls,
                                  string extras);
 };