Moving app_view to extensions.

Bug=352290

Review URL: https://codereview.chromium.org/486903002

Cr-Commit-Position: refs/heads/master@{#291138}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291138 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index dd4c1f9c..e7e1f0dd 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1483,7 +1483,7 @@
     IDS_FLAGS_ENABLE_APP_VIEW_NAME,
     IDS_FLAGS_ENABLE_APP_VIEW_DESCRIPTION,
     kOsAll,
-    SINGLE_VALUE_TYPE(switches::kEnableAppView)
+    SINGLE_VALUE_TYPE(extensions::switches::kEnableAppView)
   },
   {
     "disable-app-list-app-info",