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

chrome/browser/autocomplete/url_prefix.cc

Index: chrome/browser/autocomplete/url_prefix.cc
diff --git a/chrome/browser/autocomplete/url_prefix.cc b/chrome/browser/autocomplete/url_prefix.cc
index 51a0c7cdcfa7791d44abf2cb5d0672cdb334a7bc..b304c7c56a5e5fd026a4085ba4e8adbe027ec392 100644
--- a/chrome/browser/autocomplete/url_prefix.cc
+++ b/chrome/browser/autocomplete/url_prefix.cc
@@ -17,13 +17,13 @@ URLPrefix::URLPrefix(const base::string16& prefix, size_t num_components)
 const URLPrefixes& URLPrefix::GetURLPrefixes() {
   CR_DEFINE_STATIC_LOCAL(URLPrefixes, prefixes, ());
   if (prefixes.empty()) {
-    prefixes.push_back(URLPrefix(ASCIIToUTF16("https://www."), 2));
-    prefixes.push_back(URLPrefix(ASCIIToUTF16("http://www."), 2));
-    prefixes.push_back(URLPrefix(ASCIIToUTF16("ftp://ftp."), 2));
-    prefixes.push_back(URLPrefix(ASCIIToUTF16("ftp://www."), 2));
-    prefixes.push_back(URLPrefix(ASCIIToUTF16("https://"), 1));
-    prefixes.push_back(URLPrefix(ASCIIToUTF16("http://"), 1));
-    prefixes.push_back(URLPrefix(ASCIIToUTF16("ftp://"), 1));
+    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("https://www."), 2));
+    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("http://www."), 2));
+    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://ftp."), 2));
+    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://www."), 2));
+    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("https://"), 1));
+    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("http://"), 1));
+    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://"), 1));
     prefixes.push_back(URLPrefix(base::string16(), 0));
   }
   return prefixes;