[Mac] Hide all shims when Chrome is hidden.

apps/app_shim/extension_app_shim_handler_mac.cc

Index: apps/app_shim/extension_app_shim_handler_mac.cc
diff --git a/apps/app_shim/extension_app_shim_handler_mac.cc b/apps/app_shim/extension_app_shim_handler_mac.cc
index 48f4eeeccd7dd27ce7b4de5eaa8795f6ddd31909..4ec7e1732fb83ed1a42ac8810568a03dc83fdfe1 100644
--- a/apps/app_shim/extension_app_shim_handler_mac.cc
+++ b/apps/app_shim/extension_app_shim_handler_mac.cc
@@ -292,6 +292,21 @@ bool ExtensionAppShimHandler::RequestUserAttentionForWindow(
   }
 }
 
+// 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,