Added classes to enable session sync functionality....

chrome/browser/sync/sync_setup_flow.cc

Index: chrome/browser/sync/sync_setup_flow.cc
===================================================================
--- chrome/browser/sync/sync_setup_flow.cc	(revision 56023)
+++ chrome/browser/sync/sync_setup_flow.cc	(working copy)
@@ -106,6 +106,12 @@
   if (sync_extensions)
     data_types->insert(syncable::EXTENSIONS);
 
+  bool sync_sessions;
+  if (!result->GetBoolean(L"syncSessions", &sync_sessions))
+    return false;
+  if (sync_sessions)
+    data_types->insert(syncable::SESSIONS);
+
   bool sync_typed_urls;
   if (!result->GetBoolean(L"syncTypedUrls", &sync_typed_urls))
     return false;
@@ -182,7 +188,6 @@
 
 // Called by SyncSetupFlow::Advance.
 void FlowHandler::ShowChooseDataTypes(const DictionaryValue& args) {
-
   // If you're starting the wizard at the Choose Data Types screen (i.e. from
   // "Customize Sync"), this will be redundant.  However, if you're coming from
   // another wizard state, this will make sure Choose Data Types is on top.
@@ -353,6 +358,8 @@
       registered_types.count(syncable::EXTENSIONS) > 0);
   args->SetBoolean(L"typedUrlsRegistered",
       registered_types.count(syncable::TYPED_URLS) > 0);
+  args->SetBoolean(L"sessionsRegistered",
+      registered_types.count(syncable::SESSIONS) > 0);
 
   args->SetBoolean(L"syncBookmarks",
       service->profile()->GetPrefs()->GetBoolean(prefs::kSyncBookmarks));
@@ -366,6 +373,8 @@
       service->profile()->GetPrefs()->GetBoolean(prefs::kSyncAutofill));
   args->SetBoolean(L"syncExtensions",
       service->profile()->GetPrefs()->GetBoolean(prefs::kSyncExtensions));
+  args->SetBoolean(L"syncSessions",
+      service->profile()->GetPrefs()->GetBoolean(prefs::kSyncSessions));
   args->SetBoolean(L"syncTypedUrls",
       service->profile()->GetPrefs()->GetBoolean(prefs::kSyncTypedUrls));
 }