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

chrome/browser/shell_integration_linux.cc

Index: chrome/browser/shell_integration_linux.cc
diff --git a/chrome/browser/shell_integration_linux.cc b/chrome/browser/shell_integration_linux.cc
index eb4d9990350ad774038b7817a7ac4da0c682f82c..16725ca7cc0631a8ad68bc75d9c7e1722002c4a5 100644
--- a/chrome/browser/shell_integration_linux.cc
+++ b/chrome/browser/shell_integration_linux.cc
@@ -736,7 +736,7 @@ std::string GetDesktopFileContents(
   g_key_file_set_string(key_file, kDesktopEntry, "Type", "Application");
 
   // Set the "Name" key.
-  std::string final_title = UTF16ToUTF8(title);
+  std::string final_title = base::UTF16ToUTF8(title);
   // Make sure no endline characters can slip in and possibly introduce
   // additional lines (like Exec, which makes it a security risk). Also
   // use the URL as a default when the title is empty.
@@ -806,7 +806,7 @@ std::string GetDirectoryFileContents(const base::string16& title,
 
   g_key_file_set_string(key_file, kDesktopEntry, "Version", "1.0");
   g_key_file_set_string(key_file, kDesktopEntry, "Type", "Directory");
-  std::string final_title = UTF16ToUTF8(title);
+  std::string final_title = base::UTF16ToUTF8(title);
   g_key_file_set_string(key_file, kDesktopEntry, "Name", final_title.c_str());
   if (!icon_name.empty()) {
     g_key_file_set_string(key_file, kDesktopEntry, "Icon", icon_name.c_str());