Set up field trial for precache experiment

components/precache/content/precache_manager.cc

 // Copyright 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.
 
 #include "components/precache/content/precache_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/time/time.h"
 #include "components/precache/core/precache_database.h"
 #include "components/precache/core/precache_switches.h"
 #include "components/precache/core/url_list_provider.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/network_change_notifier.h"
 
 using content::BrowserThread;
 
 namespace {
 
 const char kPrecacheFieldTrialName[] = "Precache";
-const char kPrecacheFieldTrialEnabledGroup[] = "PrecacheEnabled";
+const char kPrecacheFieldTrialEnabledGroup[] = "Enabled";
 
 }  // namespace
 
 namespace precache {
 
 PrecacheManager::PrecacheManager(content::BrowserContext* browser_context)
     : browser_context_(browser_context),
       precache_database_(new PrecacheDatabase()),
       is_precaching_(false) {
   base::FilePath db_path(browser_context_->GetPath().Append(
@@ skipping 118 matching lines @@
     return;
   }
 
   // Start precaching.
   precache_fetcher_.reset(
       new PrecacheFetcher(urls, browser_context_->GetRequestContext(), this));
   precache_fetcher_->Start();
 }
 
 }  // namespace precache