Implement a salt for MediaSource IDs that can be cleared by a user.

chrome/browser/browsing_data/browsing_data_remover.cc

 // 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.
 
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 
 #include <map>
 #include <set>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/platform_file.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/autofill/personal_data_manager_factory.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/extensions/activity_log/activity_log.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 #include "chrome/browser/history/history_service.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/io_thread.h"
+#include "chrome/browser/media/media_device_id_salt.h"
 #include "chrome/browser/nacl_host/nacl_browser.h"
 #include "chrome/browser/nacl_host/pnacl_host.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/password_manager/password_store.h"
 #include "chrome/browser/password_manager/password_store_factory.h"
 #include "chrome/browser/predictors/logged_in_predictor_table.h"
 #include "chrome/browser/predictors/predictor_database.h"
 #include "chrome/browser/predictors/predictor_database_factory.h"
 #include "chrome/browser/prerender/prerender_manager.h"
@@ skipping 378 matching lines @@
         net::URLRequestContextGetter* sb_context =
             sb_service->url_request_context();
         ++waiting_for_clear_cookies_count_;
         BrowserThread::PostTask(
             BrowserThread::IO, FROM_HERE,
             base::Bind(&BrowsingDataRemover::ClearCookiesOnIOThread,
                        base::Unretained(this), base::Unretained(sb_context)));
       }
     }
 #endif
+    MediaDeviceIDSalt::Reset(profile_->GetPrefs());
   }
 
   // Server bound certs are not separated for protected and unprotected web
   // origins. We check the origin_set_mask_ to prevent unintended deletion.
   if (remove_mask & REMOVE_SERVER_BOUND_CERTS &&
       origin_set_mask_ & BrowsingDataHelper::UNPROTECTED_WEB) {
     content::RecordAction(
         UserMetricsAction("ClearBrowsingData_ServerBoundCerts"));
     // Since we are running on the UI thread don't call GetURLRequestContext().
     net::URLRequestContextGetter* rq_context = profile_->GetRequestContext();
@@ skipping 744 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   waiting_for_clear_autofill_origin_urls_ = false;
   NotifyAndDeleteIfDone();
 }
 
 void BrowsingDataRemover::OnClearWebRTCIdentityStore() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   waiting_for_clear_webrtc_identity_store_ = false;
   NotifyAndDeleteIfDone();
 }