Misc cleanups in Drive code.

chrome/browser/google_apis/drive_api_service.h

Index: chrome/browser/google_apis/drive_api_service.h
diff --git a/chrome/browser/google_apis/drive_api_service.h b/chrome/browser/google_apis/drive_api_service.h
index 649c79f290a5e749ca73fbe839d7261db31d8234..9dd554965fdc22c08402b2c80fd5a3315a2dce28 100644
--- a/chrome/browser/google_apis/drive_api_service.h
+++ b/chrome/browser/google_apis/drive_api_service.h
@@ -9,7 +9,6 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
-#include "chrome/browser/google_apis/auth_service.h"
 #include "chrome/browser/google_apis/auth_service_observer.h"
 #include "chrome/browser/google_apis/drive_api_url_generator.h"
 #include "chrome/browser/google_apis/drive_service_interface.h"
@@ -144,7 +143,7 @@ class DriveAPIService : public DriveServiceInterface,
                    const std::string& search_query,
                    const GetResourceListCallback& callback);
 
-  // AuthService::Observer override.
+  // AuthServiceObserver override.
   virtual void OnOAuth2RefreshTokenChanged() OVERRIDE;
 
   // DriveServiceObserver Overrides