Add utf_string_conversions to base namespace.

chrome/installer/util/shell_util.cc

Index: chrome/installer/util/shell_util.cc
diff --git a/chrome/installer/util/shell_util.cc b/chrome/installer/util/shell_util.cc
index 0bc63535da6a9a7269db2d72e72192de42b69338..17e1c0b81795cc6fad9073a3979d62eaf51a8edf 100644
--- a/chrome/installer/util/shell_util.cc
+++ b/chrome/installer/util/shell_util.cc
@@ -370,11 +370,12 @@ class RegistryEntry {
     // Note: not using CommandLine since it has ambiguous rules for quoting
     // strings.
     entries->push_back(new RegistryEntry(install_info, kReinstallCommand,
-        quoted_exe_path + L" --" + ASCIIToWide(switches::kMakeDefaultBrowser)));
+        quoted_exe_path + L" --" +
+        base::ASCIIToWide(switches::kMakeDefaultBrowser)));
     entries->push_back(new RegistryEntry(install_info, L"HideIconsCommand",
-        quoted_exe_path + L" --" + ASCIIToWide(switches::kHideIcons)));
+        quoted_exe_path + L" --" + base::ASCIIToWide(switches::kHideIcons)));
     entries->push_back(new RegistryEntry(install_info, L"ShowIconsCommand",
-        quoted_exe_path + L" --" + ASCIIToWide(switches::kShowIcons)));
+        quoted_exe_path + L" --" + base::ASCIIToWide(switches::kShowIcons)));
     entries->push_back(new RegistryEntry(install_info, L"IconsVisible", 1));
 
     // Register with Default Programs.