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

chrome/browser/ui/cocoa/status_bubble_mac_unittest.mm

 // Copyright (c) 2011 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 <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #import "chrome/browser/ui/cocoa/bubble_view.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/status_bubble_mac.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #include "ui/gfx/point.h"
 #include "url/gurl.h"
 
+using base::UTF8ToUTF16;
+
 // The test delegate records all of the status bubble object's state
 // transitions.
 @interface StatusBubbleMacTestDelegate : NSObject {
  @private
   NSWindow* window_;  // Weak.
   NSPoint baseFrameOffset_;
   std::vector<StatusBubbleMac::StatusBubbleState> states_;
 }
 - (id)initWithWindow:(NSWindow*)window;
 - (void)forceBaseFrameOffset:(NSPoint)baseFrameOffset;
@@ skipping 624 matching lines @@
   int windowWidth = NSWidth([window frame]);
   for (int x = 0; x < windowWidth; x += smallValue) {
     ASSERT_TRUE(CheckAvoidsMouse(x, smallValue));
   }
 
   // Simulate moving the mouse from right to left.
   for (int x = windowWidth; x >= 0; x -= smallValue) {
     ASSERT_TRUE(CheckAvoidsMouse(x, smallValue));
   }
 }