Use ThreadChecker rather than DCHECK_CURRENTLY_ON.

chrome/browser/content_settings/host_content_settings_map.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/content_settings/host_content_settings_map.h"
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/clock.h"
 #include "chrome/browser/content_settings/content_settings_default_provider.h"
 #include "chrome/browser/content_settings/content_settings_policy_provider.h"
 #include "chrome/browser/content_settings/content_settings_pref_provider.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
-#include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "components/content_settings/core/browser/content_settings_details.h"
 #include "components/content_settings/core/browser/content_settings_observable_provider.h"
 #include "components/content_settings/core/browser/content_settings_provider.h"
 #include "components/content_settings/core/browser/content_settings_rule.h"
 #include "components/content_settings/core/common/content_settings_pattern.h"
 #include "components/pref_registry/pref_registry_syncable.h"
-#include "content/public/browser/browser_thread.h"
 #include "net/base/net_errors.h"
 #include "net/base/static_cookie_policy.h"
 #include "url/gurl.h"
 
 #if defined(ENABLE_EXTENSIONS)
 #include "extensions/common/constants.h"
 #endif
 
-using content::BrowserThread;
-
 namespace {
 
 typedef std::vector<content_settings::Rule> Rules;
 
 typedef std::pair<std::string, std::string> StringPair;
 
 // TODO(bauerb): Expose constants.
 const char* kProviderNames[] = {
   "platform_app",
   "policy",
@@ skipping 270 matching lines @@
                     content_type,
                     resource_identifier,
                     value);
 }
 
 ContentSetting HostContentSettingsMap::GetContentSettingAndMaybeUpdateLastUsage(
     const GURL& primary_url,
     const GURL& secondary_url,
     ContentSettingsType content_type,
     const std::string& resource_identifier) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(thread_checker_.CalledOnValidThread());
 
   ContentSetting setting = GetContentSetting(
       primary_url, secondary_url, content_type, resource_identifier);
   if (setting == CONTENT_SETTING_ALLOW) {
     UpdateLastUsageByPattern(
         ContentSettingsPattern::FromURLNoWildcard(primary_url),
         ContentSettingsPattern::FromURLNoWildcard(secondary_url),
         content_type);
   }
   return setting;
@@ skipping 228 matching lines @@
                                             content_type,
                                             resource_identifier));
 }
 
 HostContentSettingsMap::~HostContentSettingsMap() {
   DCHECK(!prefs_);
   STLDeleteValues(&content_settings_providers_);
 }
 
 void HostContentSettingsMap::ShutdownOnUIThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(prefs_);
   prefs_ = NULL;
   for (ProviderIterator it = content_settings_providers_.begin();
        it != content_settings_providers_.end();
        ++it) {
     it->second->ShutdownOnUIThread();
   }
 }
 
 void HostContentSettingsMap::MigrateObsoleteClearOnExitPref() {
@@ skipping 210 matching lines @@
     }
   }
 
   if (info) {
     info->source = content_settings::SETTING_SOURCE_NONE;
     info->primary_pattern = ContentSettingsPattern();
     info->secondary_pattern = ContentSettingsPattern();
   }
   return scoped_ptr<base::Value>();
 }