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

content/browser/media/encrypted_media_browsertest.cc

Index: content/browser/media/encrypted_media_browsertest.cc
diff --git a/content/browser/media/encrypted_media_browsertest.cc b/content/browser/media/encrypted_media_browsertest.cc
index f4e5eafdc4c70802109ddf8a4db0e81b8fbf1452..9c0dbac63518a87b9a2e71c1ff3aa43f193a1ad1 100644
--- a/content/browser/media/encrypted_media_browsertest.cc
+++ b/content/browser/media/encrypted_media_browsertest.cc
@@ -116,8 +116,8 @@ class EncryptedMediaTest : public content::MediaBrowserTest,
   // We want to fail quickly when a test fails because an error is encountered.
   virtual void AddWaitForTitles(content::TitleWatcher* title_watcher) OVERRIDE {
     MediaBrowserTest::AddWaitForTitles(title_watcher);
-    title_watcher->AlsoWaitForTitle(ASCIIToUTF16(kEmeNotSupportedError));
-    title_watcher->AlsoWaitForTitle(ASCIIToUTF16(kEmeKeyError));
+    title_watcher->AlsoWaitForTitle(base::ASCIIToUTF16(kEmeNotSupportedError));
+    title_watcher->AlsoWaitForTitle(base::ASCIIToUTF16(kEmeKeyError));
   }
 
 #if defined(OS_ANDROID)