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

chrome/browser/extensions/webstore_install_helper.cc

Index: chrome/browser/extensions/webstore_install_helper.cc
diff --git a/chrome/browser/extensions/webstore_install_helper.cc b/chrome/browser/extensions/webstore_install_helper.cc
index d105da6378db2fa682617e2a9fb28634ff3ccbfc..7fd097413e4bffcbb74c1bd93ec945f1c388cfd0 100644
--- a/chrome/browser/extensions/webstore_install_helper.cc
+++ b/chrome/browser/extensions/webstore_install_helper.cc
@@ -152,11 +152,11 @@ void WebstoreInstallHelper::OnJSONParseSucceeded(
     const base::ListValue& wrapper) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   manifest_parse_complete_ = true;
-  const Value* value = NULL;
+  const base::Value* value = NULL;
   CHECK(wrapper.Get(0, &value));
-  if (value->IsType(Value::TYPE_DICTIONARY)) {
+  if (value->IsType(base::Value::TYPE_DICTIONARY)) {
     parsed_manifest_.reset(
-        static_cast<const DictionaryValue*>(value)->DeepCopy());
+        static_cast<const base::DictionaryValue*>(value)->DeepCopy());
   } else {
     parse_error_ = Delegate::MANIFEST_ERROR;
   }