[Mac] Hide all shims when Chrome is hidden.

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_host_manager_mac.h"
 #include "apps/app_shim/app_shim_messages.h"
 #include "apps/app_window.h"
@@ skipping 274 matching lines @@
     AppWindowRegistry::Get(profile)->AppWindowActivated(app_window);
     host->OnAppRequestUserAttention();
     return true;
   } else {
     // Just show the app.
     SetAppHidden(profile, app_window->extension_id(), false);
     return false;
   }
 }
 
+// static
+void ExtensionAppShimHandler::OnChromeWillHide() {
+  // Send OnAppHide to all the shims so that they go into the hidden state.
+  // This is necessary so that when the shim is next focused, it will know to
+  // unhide.
+  ExtensionAppShimHandler* handler = g_browser_process->platform_part()

[tapted, 2014/07/18 06:24:34]

nit: WDYT about adding a GetHandler/GetInstance() private static helper
function? there's 4 other occurrences of this code now (and clang-format now
wants the format to be different :p)

[jackhou1, 2014/07/21 01:11:27]

Done.

+                                         ->app_shim_host_manager()
+                                         ->extension_app_shim_handler();
+  for (HostMap::iterator it = handler->hosts_.begin();
+       it != handler->hosts_.end();
+       ++it) {
+    it->second->OnAppHide();
+  }
+}
+
 void ExtensionAppShimHandler::OnShimLaunch(
     Host* host,
     AppShimLaunchType launch_type,
     const std::vector<base::FilePath>& files) {
   const std::string& app_id = host->GetAppId();
   DCHECK(extensions::Extension::IdIsValid(app_id));
 
   const base::FilePath& profile_path = host->GetProfilePath();
   DCHECK(!profile_path.empty());
 
@@ skipping 218 matching lines @@
   if (hosts_.empty())
     delegate_->MaybeTerminate();
 }
 
 void ExtensionAppShimHandler::OnAppStop(Profile* profile,
                                         const std::string& app_id) {}
 
 void ExtensionAppShimHandler::OnChromeTerminating() {}
 
 }  // namespace apps