Clear the shader disk cache whenver we receive REMOVE_CACHE.

chrome/browser/browsing_data/browsing_data_remover.h

 // Copyright (c) 2012 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_BROWSING_DATA_BROWSING_DATA_REMOVER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_H_
 
 #include <set>
 
 #include "base/gtest_prod_util.h"
@@ skipping 64 matching lines @@
     REMOVE_FORM_DATA = 1 << 5,
     // In addition to visits, REMOVE_HISTORY removes keywords and last session.
     REMOVE_HISTORY = 1 << 6,
     REMOVE_INDEXEDDB = 1 << 7,
     REMOVE_LOCAL_STORAGE = 1 << 8,
     REMOVE_PLUGIN_DATA = 1 << 9,
     REMOVE_PASSWORDS = 1 << 10,
     REMOVE_WEBSQL = 1 << 11,
     REMOVE_SERVER_BOUND_CERTS = 1 << 12,
     REMOVE_CONTENT_LICENSES = 1 << 13,
-    REMOVE_SHADER_CACHE = 1 << 14,
     // The following flag is used only in tests. In normal usage, hosted app
     // data is controlled by the REMOVE_COOKIES flag, applied to the
     // protected-web origin.
     REMOVE_HOSTED_APP_DATA_TESTONLY = 1 << 31,
 
     // "Site data" includes cookies, appcache, file systems, indexedDBs, local
     // storage, webSQL, shader, and plugin data.

[Pam (message me for reviews), 2013/06/18 08:28:52]

This says "shader" but doesn't include the shader cache.

     REMOVE_SITE_DATA = REMOVE_APPCACHE | REMOVE_COOKIES | REMOVE_FILE_SYSTEMS |
                        REMOVE_INDEXEDDB | REMOVE_LOCAL_STORAGE |
                        REMOVE_PLUGIN_DATA | REMOVE_WEBSQL |
                        REMOVE_SERVER_BOUND_CERTS,
-    // "cached data" includes the http cache and the shader cache.
-    REMOVE_CACHED_DATA = REMOVE_CACHE | REMOVE_SHADER_CACHE
   };
 
   // When BrowsingDataRemover successfully removes data, a notification of type
   // NOTIFICATION_BROWSING_DATA_REMOVED is triggered with a Details object of
   // this type.
   struct NotificationDetails {
     NotificationDetails();
     NotificationDetails(const NotificationDetails& details);
     NotificationDetails(base::Time removal_begin,
                        int removal_mask,
@@ skipping 327 matching lines @@
 
   ObserverList<Observer> observer_list_;
 
   // Used if we need to clear history.
   CancelableTaskTracker history_task_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataRemover);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_H_