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

chrome/browser/ui/autofill/generated_credit_card_bubble_controller_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string16.h"
@@ skipping 13 matching lines @@
 
 #if defined(OS_WIN)
 #include "ui/base/win/scoped_ole_initializer.h"
 #endif
 
 namespace autofill {
 
 namespace {
 
 base::string16 BackingCard() {
-  return ASCIIToUTF16("Visa - 1111");
+  return base::ASCIIToUTF16("Visa - 1111");
 }
 
 base::string16 FrontingCard() {
-  return ASCIIToUTF16("Mastercard - 4444");
+  return base::ASCIIToUTF16("Mastercard - 4444");
 }
 
 base::string16 RangeOfString(const base::string16& string,
                              const gfx::Range& range) {
   return string.substr(range.start(), range.end() - range.start());
 }
 
 class GeneratedCreditCardBubbleControllerTest : public testing::Test {
  public:
   GeneratedCreditCardBubbleControllerTest()
@@ skipping 118 matching lines @@
 
   // If the user reloads or the page redirects or submits a form, the bubble
   // should stay showing.
   NavigateWithTransition(content::PAGE_TRANSITION_CLIENT_REDIRECT);
   NavigateWithTransition(content::PAGE_TRANSITION_FORM_SUBMIT);
   NavigateWithTransition(content::PAGE_TRANSITION_RELOAD);
   EXPECT_TRUE(controller()->GetTestingBubble()->showing());
 }
 
 }  // namespace autofill