[Prerender] Get the prerender mode from Finch field trial.

chrome/browser/ui/webui/net_internals/net_internals_ui_browsertest.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_browsertest.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/io_thread.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/webui/net_internals/net_internals_ui.h"
 #include "chrome/common/channel_info.h"
-#include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/net_log/chrome_net_log.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui_message_handler.h"
 #include "net/base/address_list.h"
 #include "net/base/net_errors.h"
 #include "net/dns/host_cache.h"
@@ skipping 283 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 
 NetInternalsTest::NetInternalsTest()
     : test_server_started_(false) {
   message_handler_.reset(new MessageHandler(this));
 }
 
 NetInternalsTest::~NetInternalsTest() {
 }
 
-void NetInternalsTest::SetUpCommandLine(base::CommandLine* command_line) {
-  WebUIBrowserTest::SetUpCommandLine(command_line);
-  // Needed to test the prerender view.
-  command_line->AppendSwitchASCII(switches::kPrerenderMode,
-                                  switches::kPrerenderModeSwitchValueEnabled);
-}
-
 void NetInternalsTest::SetUpOnMainThread() {
   WebUIBrowserTest::SetUpOnMainThread();
+  // Needed to test the prerender view.
+  prerender::PrerenderManager::SetMode(
+      prerender::PrerenderManager::PRERENDER_MODE_ENABLED);
   // Increase the memory allowed in a prerendered page above normal settings,
   // as debug builds use more memory and often go over the usual limit.
   Profile* profile = browser()->profile();
   prerender::PrerenderManager* prerender_manager =
       prerender::PrerenderManagerFactory::GetForBrowserContext(profile);
   prerender_manager->mutable_config().max_bytes = 1000 * 1024 * 1024;
 }
 
 content::WebUIMessageHandler* NetInternalsTest::GetMockMessageHandler() {
   return message_handler_.get();
@@ skipping 16 matching lines @@
   if (test_server_started_)
     return true;
   test_server_started_ = embedded_test_server()->Start();
 
   // Sample domain for SDCH-view test. Dictionaries for localhost/127.0.0.1
   // are forbidden.
   host_resolver()->AddRule("testdomain.com", "127.0.0.1");
   host_resolver()->AddRule("sub.testdomain.com", "127.0.0.1");
   return test_server_started_;
 }