Remove http_throttling.may_experiment pref.

chrome/browser/ui/webui/net_internals/net_internals_ui.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/ui/webui/net_internals/net_internals_ui.h"
 
 #include <algorithm>
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 233 matching lines @@
     CancelableRequestConsumer consumer_;
     // Libcros request handle.
     CancelableRequestProvider::Handle syslogs_request_id_;
   };
 #endif
 
   // The pref member about whether HTTP throttling is enabled, which needs to
   // be accessed on the UI thread.
   BooleanPrefMember http_throttling_enabled_;
 
-  // The pref member that determines whether experimentation on HTTP throttling
-  // is allowed (this becomes false once the user explicitly sets the
-  // feature to on or off).
-  BooleanPrefMember http_throttling_may_experiment_;
-
   // This is the "real" message handler, which lives on the IO thread.
   scoped_refptr<IOThreadImpl> proxy_;
 
   base::WeakPtr<prerender::PrerenderManager> prerender_manager_;
 
 #ifdef OS_CHROMEOS
   // Class that handles getting and filtering system logs.
   scoped_ptr<SystemLogsGetter> syslogs_getter_;
 #endif
 
@@ skipping 153 matching lines @@
   }
 }
 
 void NetInternalsMessageHandler::RegisterMessages() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   Profile* profile = Profile::FromWebUI(web_ui());
   PrefService* pref_service = profile->GetPrefs();
   http_throttling_enabled_.Init(
       prefs::kHttpThrottlingEnabled, pref_service, this);
-  http_throttling_may_experiment_.Init(
-      prefs::kHttpThrottlingMayExperiment, pref_service, NULL);
 
   proxy_ = new IOThreadImpl(this->AsWeakPtr(), g_browser_process->io_thread(),
                             profile->GetRequestContext());
 #ifdef OS_CHROMEOS
   syslogs_getter_.reset(new SystemLogsGetter(this,
       chromeos::system::SyslogsProvider::GetInstance()));
 #endif
 
   prerender::PrerenderManager* prerender_manager =
       prerender::PrerenderManagerFactory::GetForProfile(profile);
@@ skipping 164 matching lines @@
 void NetInternalsMessageHandler::OnEnableHttpThrottling(const ListValue* list) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   bool enable = false;
   if (!list->GetBoolean(0, &enable)) {
     NOTREACHED();
     return;
   }
 
   http_throttling_enabled_.SetValue(enable);
-
-  // We never receive OnEnableHttpThrottling unless the user has modified
-  // the value of the checkbox on the about:net-internals page.  Once the
-  // user does that, we no longer change its value automatically (e.g.
-  // by changing the default or running an experiment).
-  if (http_throttling_may_experiment_.GetValue()) {
-    http_throttling_may_experiment_.SetValue(false);
-  }
 }
 
 void NetInternalsMessageHandler::OnClearBrowserCache(const ListValue* list) {
   BrowsingDataRemover* remover =
       new BrowsingDataRemover(Profile::FromWebUI(web_ui()),
                               BrowsingDataRemover::EVERYTHING,
                               base::Time());
   remover->Remove(BrowsingDataRemover::REMOVE_CACHE);
   // BrowsingDataRemover deletes itself.
 }
@@ skipping 946 matching lines @@
 
 NetInternalsUI::NetInternalsUI(content::WebUI* web_ui)
     : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new NetInternalsMessageHandler());
 
   // Set up the chrome://net-internals/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   profile->GetChromeURLDataManager()->AddDataSource(
       CreateNetInternalsHTMLSource());
 }