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

content/test/content_browser_test_test.cc

Index: content/test/content_browser_test_test.cc
diff --git a/content/test/content_browser_test_test.cc b/content/test/content_browser_test_test.cc
index b9bf217f38862d5e051975c54b182b95d9dd4fd3..21b4543ba66fefd2484f74a09385d1535e75959e 100644
--- a/content/test/content_browser_test_test.cc
+++ b/content/test/content_browser_test_test.cc
@@ -31,7 +31,7 @@ class ContentBrowserTestSanityTest : public ContentBrowserTest {
   void Test() {
     GURL url = GetTestUrl(".", "simple_page.html");
 
-    base::string16 expected_title(ASCIIToUTF16("OK"));
+    base::string16 expected_title(base::ASCIIToUTF16("OK"));
     TitleWatcher title_watcher(shell()->web_contents(), expected_title);
     NavigateToURL(shell(), url);
     base::string16 title = title_watcher.WaitAndGetTitle();