[Mac] Bounce app shims when app windows request attention.

apps/app_shim/app_shim_launch.h

 // Copyright 2013 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.
 
 #ifndef APPS_APP_SHIM_APP_SHIM_LAUNCH_H_
 #define APPS_APP_SHIM_APP_SHIM_LAUNCH_H_
 
 namespace apps {
 
 enum AppShimLaunchType {
@@ skipping 23 matching lines @@
   // Just focus the app.
   APP_SHIM_FOCUS_NORMAL = 0,
   // Focus the app or launch it if it has no windows open.
   APP_SHIM_FOCUS_REOPEN,
   // Open the given file in the app.
   APP_SHIM_FOCUS_OPEN_FILES,
   // Counter and end marker.
   APP_SHIM_FOCUS_NUM_TYPES
 };
 
+enum AppShimAttentionType {
+  // Removes any active attention request.
+  APP_SHIM_ATTENTION_CANCEL = 0,
+  // Bounces the shim in the dock briefly.
+  APP_SHIM_ATTENTION_INFORMATIONAL,
+  // Bounces the shim in the dock continuously.
+  APP_SHIM_ATTENTION_CRITICAL,
+  // Counter and end marker.
+  APP_SHIM_ATTENTION_NUM_TYPES
+};
+
 }  // namespace apps
 
 #endif  // APPS_APP_SHIM_APP_SHIM_LAUNCH_H_