Update uses of UTF conversions in chrome/common to use the base:: namespace.

chrome/common/chrome_version_info.cc

Index: chrome/common/chrome_version_info.cc
diff --git a/chrome/common/chrome_version_info.cc b/chrome/common/chrome_version_info.cc
index 7671a3d4d1d9dbad93e0e7a7f12450becbdcc250..5daa6d1dc8453179f822bc6904300e838786580a 100644
--- a/chrome/common/chrome_version_info.cc
+++ b/chrome/common/chrome_version_info.cc
@@ -42,19 +42,19 @@ bool VersionInfo::is_valid() const {
 std::string VersionInfo::Name() const {
   if (!is_valid())
     return std::string();
-  return UTF16ToUTF8(version_info_->product_name());
+  return base::UTF16ToUTF8(version_info_->product_name());
 }
 
 std::string VersionInfo::Version() const {
   if (!is_valid())
     return std::string();
-  return UTF16ToUTF8(version_info_->product_version());
+  return base::UTF16ToUTF8(version_info_->product_version());
 }
 
 std::string VersionInfo::LastChange() const {
   if (!is_valid())
     return std::string();
-  return UTF16ToUTF8(version_info_->last_change());
+  return base::UTF16ToUTF8(version_info_->last_change());
 }
 
 bool VersionInfo::IsOfficialBuild() const {