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

chrome/browser/ui/cocoa/external_protocol_dialog.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.
 
 #import "chrome/browser/ui/cocoa/external_protocol_dialog.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 53 matching lines @@
 
   NSButton* allowButton = [alert_ addButtonWithTitle:
       l10n_util::GetNSStringWithFixup(IDS_EXTERNAL_PROTOCOL_OK_BUTTON_TEXT)];
   [allowButton setKeyEquivalent:@""];  // disallow as default
   [alert_ addButtonWithTitle:
       l10n_util::GetNSStringWithFixup(
         IDS_EXTERNAL_PROTOCOL_CANCEL_BUTTON_TEXT)];
 
   const int kMaxUrlWithoutSchemeSize = 256;
   base::string16 elided_url_without_scheme;
-  gfx::ElideString(ASCIIToUTF16(url_.possibly_invalid_spec()),
+  gfx::ElideString(base::ASCIIToUTF16(url_.possibly_invalid_spec()),
                   kMaxUrlWithoutSchemeSize, &elided_url_without_scheme);
 
   NSString* urlString = l10n_util::GetNSStringFWithFixup(
       IDS_EXTERNAL_PROTOCOL_INFORMATION,
-      ASCIIToUTF16(url_.scheme() + ":"),
+      base::ASCIIToUTF16(url_.scheme() + ":"),
       elided_url_without_scheme);
   NSString* appString = l10n_util::GetNSStringFWithFixup(
       IDS_EXTERNAL_PROTOCOL_APPLICATION_TO_LAUNCH,
       appName);
   NSString* warningString =
       l10n_util::GetNSStringWithFixup(IDS_EXTERNAL_PROTOCOL_WARNING);
   NSString* informativeText =
       [NSString stringWithFormat:@"%@\n\n%@\n\n%@",
                                  urlString,
                                  appString,
@@ skipping 64 matching lines @@
   }
   NSString* appPath = [(NSURL*)openingApp path];
   CFRelease(openingApp);  // NOT A BUG; LSGetApplicationForURL retains for us
   NSString* appDisplayName =
       [[NSFileManager defaultManager] displayNameAtPath:appPath];
 
   return base::SysNSStringToUTF16(appDisplayName);
 }
 
 @end