Implement support for disabling sync through configuration management.

chrome/browser/profile.cc

Index: chrome/browser/profile.cc
diff --git a/chrome/browser/profile.cc b/chrome/browser/profile.cc
index 318969488152e833bbb297d13cd179494bba6ed1..ecf606986327f4ec7c8a5f80294cdf282c14da8a 100644
--- a/chrome/browser/profile.cc
+++ b/chrome/browser/profile.cc
@@ -276,6 +276,11 @@ URLRequestContextGetter* Profile::GetDefaultRequestContext() {
   return default_request_context_;
 }
 
+bool Profile::IsSyncAccessible() {
+  ProfileSyncService* syncService = GetProfileSyncService();
+  return syncService && !syncService->IsManaged();
+}
+
 #if defined(OS_WIN)
 #include "chrome/browser/password_manager/password_store_win.h"
 #elif defined(OS_MACOSX)
@@ -1630,9 +1635,6 @@ void ProfileImpl::StopCreateSessionServiceTimer() {
 }
 
 ProfileSyncService* ProfileImpl::GetProfileSyncService() {
-  if (!ProfileSyncService::IsSyncEnabled()) {
-    return NULL;
-  }
   if (!sync_service_.get())
     InitSyncService();
   return sync_service_.get();