Add utf_string_conversions to base namespace.

chrome/installer/util/installation_state.cc

Index: chrome/installer/util/installation_state.cc
diff --git a/chrome/installer/util/installation_state.cc b/chrome/installer/util/installation_state.cc
index 43c73ce5f8b62adc680420ee3699df02c8266210..7d99063d3ce501e26cd1aa0094154da5dd371d61 100644
--- a/chrome/installer/util/installation_state.cc
+++ b/chrome/installer/util/installation_state.cc
@@ -60,7 +60,7 @@ bool ProductState::Initialize(bool system_install,
     std::wstring version_str;
     if (key.ReadValue(google_update::kRegVersionField,
                       &version_str) == ERROR_SUCCESS) {
-      version_.reset(new Version(WideToASCII(version_str)));
+      version_.reset(new Version(base::WideToASCII(version_str)));
       if (!version_->IsValid())
         version_.reset();
     }
@@ -70,7 +70,7 @@ bool ProductState::Initialize(bool system_install,
     // only be accessible via InstallationState::GetNonVersionedProductState.
     if (key.ReadValue(google_update::kRegOldVersionField,
                       &version_str) == ERROR_SUCCESS) {
-      old_version_.reset(new Version(WideToASCII(version_str)));
+      old_version_.reset(new Version(base::WideToASCII(version_str)));
       if (!old_version_->IsValid())
         old_version_.reset();
     }