[Sync] Add sessions sync to about:flags

BUG=92111
TEST=

Review URL: http://codereview.chromium.org/7607036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96303 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/generated_resources.grd

@@ -4419,6 +4419,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_SHOW_AUTOFILL_TYPE_PREDICTIONS_DESCRIPTION" desc="Description for the flag to show Autofill field type predictions for all forms">
         Annotates web forms with Autofill field type predictions as placeholder text.
       </message>
+      <message name="IDS_FLAGS_SYNC_SESSIONS_NAME" desc="Title for the flag to enable syncing the Sessions datatype">
+        Enable syncing sessions
+      </message>
+      <message name="IDS_FLAGS_SYNC_SESSIONS_DESCRIPTION" desc="Description for the flag to enable syncing the Sessions datatype">
+        Enable sessions in the sync options. This allows syncing your sessions to other clients.
+      </message>
       <message name="IDS_FLAGS_SYNC_TYPED_URLS_NAME" desc="Title for the flag to enable syncing the TypedUrl datatype">
         Enable syncing typed URLs
       </message>

chrome/browser/about_flags.cc

@@ -290,6 +290,13 @@ const Experiment kExperiments[] = {
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kShowAutofillTypePredictions)
   },
+  {
+    "sync-sessions",
+    IDS_FLAGS_SYNC_SESSIONS_NAME,
+    IDS_FLAGS_SYNC_SESSIONS_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableSyncSessions)
+  },
   {
     "sync-typed-urls",
     IDS_FLAGS_SYNC_TYPED_URLS_NAME,