Fix app shim focus.

apps/app_shim/extension_app_shim_handler_mac.cc

 // 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.
 
 #include "apps/app_shim/extension_app_shim_handler_mac.h"
 
 #include "apps/app_lifetime_monitor_factory.h"
 #include "apps/app_shim/app_shim_messages.h"
 #include "apps/shell_window.h"
 #include "base/files/file_path.h"
@@ skipping 329 matching lines @@
 void ExtensionAppShimHandler::OnAppActivated(Profile* profile,
                                              const std::string& app_id) {
   const extensions::Extension* extension =
       delegate_->GetAppExtension(profile, app_id);
   if (!extension)
     return;
 
   HostMap::iterator it = hosts_.find(make_pair(profile, app_id));
   if (it != hosts_.end()) {
     it->second->OnAppLaunchComplete(APP_SHIM_LAUNCH_SUCCESS);
+    OnShimFocus(it->second, APP_SHIM_FOCUS_NORMAL);
     return;
   }
 
   delegate_->LaunchShim(profile, extension);
 }
 
 void ExtensionAppShimHandler::OnAppDeactivated(Profile* profile,
                                                const std::string& app_id) {}
 
 void ExtensionAppShimHandler::OnAppStop(Profile* profile,
                                         const std::string& app_id) {}
 
 void ExtensionAppShimHandler::OnChromeTerminating() {}
 
 }  // namespace apps