Initial skeleton of custom layouts for Web Notifications.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 2789d6a7efc6d613a37d8e7eee910c6d5c0cd4d4..2b40a6f4893efbb2ecc3d79bbb17b998e4b1c6b8 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -345,6 +345,10 @@ const char kDisableSync[]                   = "disable-sync";
 // --disable-synctypes='Typed URLs, Bookmarks, Autofill Profiles'
 const char kDisableSyncTypes[]              = "disable-sync-types";
 
+// Disables Web Notification custom layouts.
+const char kDisableWebNotificationCustomLayouts[] =
+    "disable-web-notification-custom-layouts";
+
 // Disables the backend service for web resources.
 const char kDisableWebResources[]           = "disable-web-resources";
 
@@ -557,6 +561,10 @@ const char kEnableUserAlternateProtocolPorts[] =
 // apps).
 const char kEnableWebAppFrame[] = "enable-web-app-frame";
 
+// Enables Web Notification custom layouts.
+const char kEnableWebNotificationCustomLayouts[] =
+    "enable-web-notification-custom-layouts";
+
 // Enables webusb notifications, which shows notifications when usb devices with
 // landing page are plugged in.
 const char kEnableWebUsbNotifications[] = "enable-webusb-notifications";