Move some more classes from net/base into the net:: namespace.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@116 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/metrics_log.cc b/chrome/browser/metrics_log.cc
index 06daa76..a563ed5 100644
--- a/chrome/browser/metrics_log.cc
+++ b/chrome/browser/metrics_log.cc
@@ -136,12 +136,11 @@
 
 std::string MetricsLog::CreateBase64Hash(const std::string& string) {
   std::string encoded_digest;
-  if (Base64Encode(CreateHash(string), &encoded_digest)) {
+  if (net::Base64Encode(CreateHash(string), &encoded_digest)) {
     DLOG(INFO) << "Metrics: Hash [" << encoded_digest << "]=[" << string << "]";
     return encoded_digest;
-  } else {
-    return std::string();
   }
+  return std::string();
 }
 
 void MetricsLog::RecordUserAction(const wchar_t* key) {