Added flag enabling new first-run UI to about:flags.

BUG=269294
NOTRY=true
TBR=nkostylev

Review URL: https://codereview.chromium.org/25099002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225723 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/generated_resources.grd

@@ -6770,6 +6770,14 @@ Keep your key file in a safe place. You will need it to create new versions of y
           Enable playing videos remotely on Chromecast.
         </message>
       </if>
+      <if expr="pp_ifdef('chromeos')">
+        <message name="IDS_FLAGS_ENABLE_FIRST_RUN_UI_NAME" desc="Name of the flag to enable new first-run UI.">
+          Enable new first-run UI.
+        </message>
+        <message name="IDS_FLAGS_ENABLE_FIRST_RUN_UI_DESCRIPTION" desc="Description for the flag to enable new first-run UI.">
+          If enabled, overlay tutorial will be shown after first login.
+        </message>
+      </if>
 
       <!-- Crashes -->
       <message name="IDS_CRASHES_TITLE" desc="Title for the chrome://crashes page.">

chrome/browser/about_flags.cc

@@ -1771,6 +1771,15 @@ const Experiment kExperiments[] = {
     SINGLE_VALUE_TYPE(switches::kEnableCast)
   },
 #endif
+#if defined(OS_CHROMEOS)
+  {
+    "enable-first-run-ui",
+    IDS_FLAGS_ENABLE_FIRST_RUN_UI_NAME,
+    IDS_FLAGS_ENABLE_FIRST_RUN_UI_DESCRIPTION,
+    kOsCrOS,
+    SINGLE_VALUE_TYPE(chromeos::switches::kEnableFirstRunUI)
+  },
+#endif
 };
 
 const Experiment* experiments = kExperiments;