Simplify BrowserContext by removing redundant methods.

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 <string>
 #include <utility>
 #include <vector>
 
 #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/strings/string_util.h"
 #include "base/time/time.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/precache/core/precache_database.h"
 #include "components/precache/core/precache_switches.h"
 #include "components/prefs/pref_service.h"
 #include "components/sync_driver/sync_service.h"
 #include "components/variations/variations_associated_data.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/storage_partition.h"
 #include "net/base/network_change_notifier.h"
 
 using content::BrowserThread;
 
 namespace {
 
 const char kPrecacheFieldTrialName[] = "Precache";
 const char kPrecacheFieldTrialEnabledGroup[] = "Enabled";
 const char kPrecacheFieldTrialControlGroup[] = "Control";
 const char kConfigURLParam[] = "config_url";
@@ skipping 236 matching lines @@
     // Don't start precaching if it was canceled while waiting for the list of
     // hosts.
     return;
   }
 
   std::vector<std::string> hosts;
   for (const auto& host_count : host_counts)
     hosts.push_back(host_count.first);
 
   // Start precaching.
-  precache_fetcher_.reset(
-      new PrecacheFetcher(hosts, browser_context_->GetRequestContext(),
-                          GURL(variations::GetVariationParamValue(
-                              kPrecacheFieldTrialName, kConfigURLParam)),
-                          variations::GetVariationParamValue(
-                              kPrecacheFieldTrialName, kManifestURLPrefixParam),
-                          this));
+  precache_fetcher_.reset(new PrecacheFetcher(
+      hosts,
+      content::BrowserContext::GetDefaultStoragePartition(browser_context_)->
+            GetURLRequestContext(),
+      GURL(variations::GetVariationParamValue(
+          kPrecacheFieldTrialName, kConfigURLParam)),
+      variations::GetVariationParamValue(
+          kPrecacheFieldTrialName, kManifestURLPrefixParam),
+      this));
   precache_fetcher_->Start();
 }
 
 void PrecacheManager::OnHostsReceivedThenDone(
     const history::TopHostsList& host_counts) {
   OnDone();
 }
 
 }  // namespace precache