Move (most of) chrome/browser/drive into components/drive/service.

chrome/browser/drive/drive_app_registry_observer.h

Index: chrome/browser/drive/drive_app_registry_observer.h
diff --git a/chrome/browser/drive/drive_app_registry_observer.h b/chrome/browser/drive/drive_app_registry_observer.h
deleted file mode 100644
index 15750e619ec9e343724dbe300d309de459b7e92a..0000000000000000000000000000000000000000
--- a/chrome/browser/drive/drive_app_registry_observer.h
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CHROME_BROWSER_DRIVE_DRIVE_APP_REGISTRY_OBSERVER_H_
-#define CHROME_BROWSER_DRIVE_DRIVE_APP_REGISTRY_OBSERVER_H_
-
-namespace drive {
-
-class DriveAppRegistryObserver {
- public:
-  // Invoked when DriveAppRegistry has updated its list of Drive apps.
-  virtual void OnDriveAppRegistryUpdated() = 0;
-
- protected:
-  virtual ~DriveAppRegistryObserver() {}
-};
-
-}  // namespace drive
-
-#endif  // CHROME_BROWSER_DRIVE_DRIVE_APP_REGISTRY_OBSERVER_H_