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

chrome/browser/local_discovery/privet_http_unittest.cc

Index: chrome/browser/local_discovery/privet_http_unittest.cc
diff --git a/chrome/browser/local_discovery/privet_http_unittest.cc b/chrome/browser/local_discovery/privet_http_unittest.cc
index 67d80447f7f2cda3f7b0fedcd816e30d3e57ac61..c3228d51ddb24427c58607df0d47749ea018cef3 100644
--- a/chrome/browser/local_discovery/privet_http_unittest.cc
+++ b/chrome/browser/local_discovery/privet_http_unittest.cc
@@ -354,7 +354,7 @@ class MockRegisterDelegate : public PrivetRegisterOperation::Delegate {
       const std::string& action,
       PrivetRegisterOperation::FailureReason reason,
       int printer_http_code,
-      const DictionaryValue* json) OVERRIDE {
+      const base::DictionaryValue* json) OVERRIDE {
     // TODO(noamsml): Save and test for JSON?
     OnPrivetRegisterErrorInternal(action, reason, printer_http_code);
   }