Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

extensions/common/extension.h

 // Copyright (c) 2013 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 EXTENSIONS_COMMON_EXTENSION_H_
 #define EXTENSIONS_COMMON_EXTENSION_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
@@ skipping 525 matching lines @@
   };
 
   Reason reason;
 
   // The extension being unloaded - this should always be non-NULL.
   const Extension* extension;
 
   UnloadedExtensionInfo(const Extension* extension, Reason reason);
 };
 
+struct UninstalledExtensionInfo {
+  enum Reason {
+    REASON_FOR_TESTING,         // Used for testing code only
+    REASON_USER_INITIATED,      // User performed some UI gesture
+    REASON_EXTENSION_DISABLED,  // Extension disabled due to error
+    REASON_STORAGE_THRESHOLD_EXCEEDED,
+    REASON_INSTALL_CANCELED,
+    REASON_MANAGEMENT_API,
+    REASON_SYNC,
+    REASON_ORPHANED_THEME,
+    REASON_ORPHANED_EPHEMERAL_EXTENSION,
+    // The entries below imply bypassing checking user has permission to
+    // uninstall the corresponding extension id.
+    REASON_ORPHANED_EXTERNAL_EXTENSION,
+    REASON_ORPHANED_SHARED_MODULE,
+    REASON_INTERNAL_MANAGEMENT  // Internal extensions (see usages)
+  };
+
+  Reason reason;
+
+  // The extension being uninstalled - this should always be non-NULL.
+  const Extension* extension;
+
+  UninstalledExtensionInfo(const Extension* extension, Reason reason);
+};
+
 // The details sent for EXTENSION_PERMISSIONS_UPDATED notifications.
 struct UpdatedExtensionPermissionsInfo {
   enum Reason {
     ADDED,    // The permissions were added to the extension.
     REMOVED,  // The permissions were removed from the extension.
   };
 
   Reason reason;
 
   // The extension who's permissions have changed.
   const Extension* extension;
 
   // The permissions that have changed. For Reason::ADDED, this would contain
   // only the permissions that have added, and for Reason::REMOVED, this would
   // only contain the removed permissions.
   const PermissionSet* permissions;
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EXTENSION_H_