[Mac] Add interactive App Shim test.

chrome/browser/web_applications/web_app_mac.h

Index: chrome/browser/web_applications/web_app_mac.h
diff --git a/chrome/browser/web_applications/web_app_mac.h b/chrome/browser/web_applications/web_app_mac.h
index 46702e4ad675f96f1e7cded07b34bdbb2d386713..51e72b499343478d3b2ab953986b60da90742ec2 100644
--- a/chrome/browser/web_applications/web_app_mac.h
+++ b/chrome/browser/web_applications/web_app_mac.h
@@ -14,6 +14,11 @@
 #include "chrome/browser/web_applications/web_app.h"
 #include "extensions/common/manifest_handlers/file_handler_info.h"
 
+// Whether to enable update and launch of of app shims in tests. (Normally shims

[tapted, 2014/06/05 05:20:12]

nit: repeated "of"

[jackhou1, 2014/06/05 06:36:04]

Done.

+// are never created or launched in tests). Note that update only creates
+// internal shim bundles, i.e. it does not create new shims in ~/Applications.
+extern bool g_app_shims_allow_update_and_launch_in_tests;
+
 namespace web_app {
 
 // Returns the full path of the .app shim that would be created by