Update some uses of Value in chrome/browser to use the base:: namespace.

chrome/browser/network_time/network_time_service.cc

Index: chrome/browser/network_time/network_time_service.cc
diff --git a/chrome/browser/network_time/network_time_service.cc b/chrome/browser/network_time/network_time_service.cc
index 9a94a90a77949e4daef895919b996ef90cbad554..82fe9e71468e33a9fa1c80451ba08a824a9a755f 100644
--- a/chrome/browser/network_time/network_time_service.cc
+++ b/chrome/browser/network_time/network_time_service.cc
@@ -61,7 +61,7 @@ void NetworkTimeService::Shutdown() {
     // mapping is accurate.
     base::Time local_now = base::Time::Now();
     base::Time network_now = GetNetworkTime(local_now);
-    DictionaryValue time_mapping;
+    base::DictionaryValue time_mapping;
     time_mapping.SetDouble("local", local_now.ToJsTime());
     time_mapping.SetDouble("network", network_now.ToJsTime());
     profile_->GetPrefs()->Set(prefs::kNetworkTimeMapping, time_mapping);