ChromeOS: Refactor TimeZoneResolver, add TimeZoneResolverManager.

chrome/browser/browser_process_platform_part_chromeos.cc

Index: chrome/browser/browser_process_platform_part_chromeos.cc
diff --git a/chrome/browser/browser_process_platform_part_chromeos.cc b/chrome/browser/browser_process_platform_part_chromeos.cc
index 7e6b13c441c341466141d96b0b599cf440be9279..b5debb4d90043751436396d355208c01fa5c0d48 100644
--- a/chrome/browser/browser_process_platform_part_chromeos.cc
+++ b/chrome/browser/browser_process_platform_part_chromeos.cc
@@ -19,6 +19,7 @@
 #include "chrome/browser/chromeos/system/device_disabling_manager.h"
 #include "chrome/browser/chromeos/system/device_disabling_manager_default_delegate.h"
 #include "chrome/browser/chromeos/system/system_clock.h"
+#include "chrome/browser/chromeos/system/timezone_resolver_manager.h"
 #include "chrome/browser/chromeos/system/timezone_util.h"
 #include "chrome/browser/lifetime/keep_alive_types.h"
 #include "chrome/browser/lifetime/scoped_keep_alive.h"
@@ -117,9 +118,19 @@ BrowserProcessPlatformPart::browser_policy_connector_chromeos() {
       g_browser_process->browser_policy_connector());
 }
 
+chromeos::system::TimeZoneResolverManager*
+BrowserProcessPlatformPart::GetTimezoneResolverManager() {
+  if (!timezone_resolver_manager_.get()) {
+    timezone_resolver_manager_.reset(
+        new chromeos::system::TimeZoneResolverManager());
+  }
+  return timezone_resolver_manager_.get();
+}
+
 chromeos::TimeZoneResolver* BrowserProcessPlatformPart::GetTimezoneResolver() {
   if (!timezone_resolver_.get()) {
     timezone_resolver_.reset(new chromeos::TimeZoneResolver(
+        GetTimezoneResolverManager(),
         g_browser_process->system_request_context(),
         chromeos::SimpleGeolocationProvider::DefaultGeolocationProviderURL(),
         base::Bind(&chromeos::system::ApplyTimeZone),