Minimum implementation of ARC clipboard Bridge

components/arc/common/arc_host_messages.h

 // 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.
 
 // Messages sent from the ARC instance to the host.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
@@ skipping 31 matching lines @@
 // Tells the Chrome that a notification is posted (created or updated) on
 // Android.
 // |notification_data| is the data of notification (id, texts, icon and ...).
 IPC_MESSAGE_CONTROL1(ArcInstanceHostMsg_NotificationPosted,
                      arc::ArcNotificationData /* notification_data */);
 
 // Notifies that a notification is removed on Android.
 // |key| is the identifier of the notification.
 IPC_MESSAGE_CONTROL1(ArcInstanceHostMsg_NotificationRemoved,
                      std::string /* key */);
+
+// Called whenever the Android clipboard content is changed. This is
+// typically fired when a user initiates a "Copy" action.
+IPC_MESSAGE_CONTROL1(ArcInstanceHostMsg_SetClipboardContent,
+                     arc::ClipboardData)
+
+// Called whenever the Android clipboard decides to update its content.
+// This is typical triggered when a "Paste" action is fired or an app
+// or service tries to retrieve the android clipboard content.

[elijahtaylor1, 2015/12/04 20:36:51]

nit: capitalize Android

+IPC_MESSAGE_CONTROL0(ArcInstanceHostMsg_GetClipboardContent)