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

chrome/browser/ui/cocoa/confirm_bubble_controller_unittest.mm

 // Copyright (c) 2012 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/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/confirm_bubble_cocoa.h"
 #import "chrome/browser/ui/cocoa/confirm_bubble_controller.h"
@@ skipping 40 matching lines @@
       accept_clicked_(accept_clicked),
       cancel_clicked_(cancel_clicked),
       link_clicked_(link_clicked) {
 }
 
 TestConfirmBubbleModel::~TestConfirmBubbleModel() {
   *model_deleted_ = true;
 }
 
 base::string16 TestConfirmBubbleModel::GetTitle() const {
-  return ASCIIToUTF16("Test");
+  return base::ASCIIToUTF16("Test");
 }
 
 base::string16 TestConfirmBubbleModel::GetMessageText() const {
-  return ASCIIToUTF16("Test Message");
+  return base::ASCIIToUTF16("Test Message");
 }
 
 gfx::Image* TestConfirmBubbleModel::GetIcon() const {
   return &ResourceBundle::GetSharedInstance().GetImageNamed(
       IDR_PRODUCT_LOGO_16);
 }
 
 int TestConfirmBubbleModel::GetButtons() const {
   return BUTTON_OK | BUTTON_CANCEL;
 }
 
 base::string16 TestConfirmBubbleModel::GetButtonLabel(
     BubbleButton button) const {
-  return button == BUTTON_OK ? ASCIIToUTF16("OK") : ASCIIToUTF16("Cancel");
+  return button == BUTTON_OK ? base::ASCIIToUTF16("OK")
+                             : base::ASCIIToUTF16("Cancel");
 }
 
 void TestConfirmBubbleModel::Accept() {
   *accept_clicked_ = true;
 }
 
 void TestConfirmBubbleModel::Cancel() {
   *cancel_clicked_ = true;
 }
 
 base::string16 TestConfirmBubbleModel::GetLinkText() const {
-  return ASCIIToUTF16("Link");
+  return base::ASCIIToUTF16("Link");
 }
 
 void TestConfirmBubbleModel::LinkClicked() {
   *link_clicked_ = true;
 }
 
 }  // namespace
 
 class ConfirmBubbleControllerTest : public CocoaTest {
  public:
@@ skipping 82 matching lines @@
   // Click its link and verify this view has been removed from the test window.
   // Also verify TestConfirmBubbleModel::LinkClicked() has been called.
   [bubble clickLink];
 
   contains_bubble_view = [[view subviews] containsObject:bubble];
   EXPECT_FALSE(contains_bubble_view);
   EXPECT_FALSE(accept_clicked());
   EXPECT_FALSE(cancel_clicked());
   EXPECT_TRUE(link_clicked());
 }