[Sync] Fix namespaces for the browser_sync component.

chrome/browser/ui/webui/sync_internals_message_handler.h

Index: chrome/browser/ui/webui/sync_internals_message_handler.h
diff --git a/chrome/browser/ui/webui/sync_internals_message_handler.h b/chrome/browser/ui/webui/sync_internals_message_handler.h
index 0f029e648edb0fe4ab67136ea0489c0ebc408de1..98d5c8943724d94ac3fc65ccbe5880d31fee4bd8 100644
--- a/chrome/browser/ui/webui/sync_internals_message_handler.h
+++ b/chrome/browser/ui/webui/sync_internals_message_handler.h
@@ -20,9 +20,12 @@
 #include "components/sync/js/js_event_handler.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
-class ProfileSyncService;
 class SigninManagerBase;
 
+namespace browser_sync {
+class ProfileSyncService;
+}  // namespace browser_sync
+
 namespace sync_driver {
 class SyncService;
 }  //  namespace sync_driver
@@ -106,7 +109,7 @@ class SyncInternalsMessageHandler : public content::WebUIMessageHandler,
   // onAboutInfoUpdated event.
   void SendAboutInfo();
 
-  ProfileSyncService* GetProfileSyncService();
+  browser_sync::ProfileSyncService* GetProfileSyncService();
 
   base::WeakPtr<syncer::JsController> js_controller_;