[Sync] Fix namespaces for the browser_sync component.

chrome/browser/profiles/profile.cc

Index: chrome/browser/profiles/profile.cc
diff --git a/chrome/browser/profiles/profile.cc b/chrome/browser/profiles/profile.cc
index f5e9820f3a3ee4ca2e27b84730c7c9db2da5b369..a645ea7cbf4236b1d8fd1728d332e282ffb5ebc0 100644
--- a/chrome/browser/profiles/profile.cc
+++ b/chrome/browser/profiles/profile.cc
@@ -214,7 +214,8 @@ bool Profile::IsSyncAllowed() {
   // No ProfileSyncService created yet - we don't want to create one, so just
   // infer the accessible state by looking at prefs/command line flags.
   sync_driver::SyncPrefs prefs(GetPrefs());
-  return ProfileSyncService::IsSyncAllowedByFlag() && !prefs.IsManaged();
+  return browser_sync::ProfileSyncService::IsSyncAllowedByFlag() &&
+         !prefs.IsManaged();
 }
 
 void Profile::MaybeSendDestroyedNotification() {