s/\bArc\b/ARC/g for ARC related code.

extensions/common/api/app_runtime.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.
 
 // Use the <code>chrome.app.runtime</code> API to manage the app lifecycle.
 // The app runtime manages app installation, controls the event page, and can
 // shut down the app at anytime.
 namespace app.runtime {
 
   [inline_doc] dictionary LaunchItem {
@@ skipping 89 matching lines @@
     boolean? isPublicSession;
 
     // Where the app is launched from.
     LaunchSource? source;
 
     // Contains data that specifies the <code>ActionType</code> this app was
     // launched with. This is null if the app was not launched with a specific
     // action intent.
     ActionData? actionData;
 
-    // Internal fields used to indicate ARC++ status on the device.
+    // Internal fields used to indicate ARC status on the device.
     [nodoc] PlayStoreStatus? playStoreStatus;
   };
 
   // This object specifies details and operations to perform on the embedding
   // request. The app to be embedded can make a decision on whether or not to
   // allow the embedding and what to embed based on the embedder making the
   // request.
   dictionary EmbedRequest {
     DOMString embedderId;
 
@@ skipping 20 matching lines @@
 
     // Fired at Chrome startup to apps that were running when Chrome last shut
     // down, or when apps have been requested to restart from their previous
     // state for other reasons (e.g. when the user revokes access to an app's
     // retained files the runtime will restart the app). In these situations if
     // apps do not have an <code>onRestarted</code> handler they will be sent
     // an <code>onLaunched </code> event instead.
     static void onRestarted();
   };
 };