Add enable-shadow-dom command line flag.

BUG=111112
TEST=Run chrome with '--enable-shadow-dom' and enter 'new WebKitShadowRoot(document.createElement('div'))' in Console.


Review URL: http://codereview.chromium.org/9285014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119652 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index fb78147..b4f23493 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -558,6 +558,13 @@
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kDisableUberPage)
   },
+  {
+    "enable-shadow-dom",
+    IDS_FLAGS_SHADOW_DOM_NAME,
+    IDS_FLAGS_SHADOW_DOM_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableShadowDOM)
+  },
 };
 
 const Experiment* experiments = kExperiments;