[sessions] Properly namespace recently-componentized TabRestore code

chrome/browser/sessions/tab_restore_service_factory.h

Index: chrome/browser/sessions/tab_restore_service_factory.h
diff --git a/chrome/browser/sessions/tab_restore_service_factory.h b/chrome/browser/sessions/tab_restore_service_factory.h
index a069d7148aa24f86423ab23a59c1774675203683..20b82ccf397bea8c37cf86b15590fd7e9d0d7f50 100644
--- a/chrome/browser/sessions/tab_restore_service_factory.h
+++ b/chrome/browser/sessions/tab_restore_service_factory.h
@@ -8,19 +8,22 @@
 #include "base/memory/singleton.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 
-class TabRestoreService;
 class Profile;
 
+namespace sessions {
+class TabRestoreService;
+}
+
 // Singleton that owns all TabRestoreServices and associates them with
 // Profiles. Listens for the Profile's destruction notification and cleans up
 // the associated TabRestoreService.
 class TabRestoreServiceFactory : public BrowserContextKeyedServiceFactory {
  public:
-  static TabRestoreService* GetForProfile(Profile* profile);
+  static sessions::TabRestoreService* GetForProfile(Profile* profile);
 
   // Variant of GetForProfile() that returns NULL if TabRestoreService does not
   // exist.
-  static TabRestoreService* GetForProfileIfExisting(Profile* profile);
+  static sessions::TabRestoreService* GetForProfileIfExisting(Profile* profile);
 
   static void ResetForProfile(Profile* profile);