Infrastructure to improve app mode stub <-> Chrome main communication.

chrome/common/mac/app_mode_common.mm

Index: chrome/common/mac/app_mode_common.mm
diff --git a/chrome/common/mac/app_mode_common.mm b/chrome/common/mac/app_mode_common.mm
index c6d557330e6fc4f30212b5ba5dab25cbcdd06352..410cb9345a7ecb88bd00aeecd32249743b52d449 100644
--- a/chrome/common/mac/app_mode_common.mm
+++ b/chrome/common/mac/app_mode_common.mm
@@ -21,6 +21,16 @@ NSString* const kShortcutURLPlaceholder = @"APP_MODE_SHORTCUT_URL";
 NSString* const kShortcutBrowserBundleIDPlaceholder =
                     @"APP_MODE_BROWSER_BUNDLE_ID";
 
+static const ChromeAppModeInfo* gAppModeInfo = NULL;
+
+void SetAppModeInfo(const ChromeAppModeInfo* info) {
+  gAppModeInfo = info;
+}
+
+const ChromeAppModeInfo* AppModeInfo() {
+  return gAppModeInfo;
+}
+
 ChromeAppModeInfo::ChromeAppModeInfo()
     : major_version(0),
       minor_version(0),