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

chrome/browser/ui/cocoa/toolbar/toolbar_controller.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/toolbar/toolbar_controller.h"
 
 #include <algorithm>
 
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
@@ skipping 758 matching lines @@
   // TODO(viettrungluu): dropping multiple URLs?
   if ([urls count] > 1)
     NOTIMPLEMENTED();
 
   // Get the first URL and fix it up.
   GURL url(URLFixerUpper::FixupURL(
       base::SysNSStringToUTF8([urls objectAtIndex:0]), std::string()));
 
   if (url.SchemeIs(content::kJavaScriptScheme)) {
     browser_->window()->GetLocationBar()->GetOmniboxView()->SetUserText(
-          OmniboxView::StripJavascriptSchemas(UTF8ToUTF16(url.spec())));
+          OmniboxView::StripJavascriptSchemas(base::UTF8ToUTF16(url.spec())));
   }
   OpenURLParams params(
       url, Referrer(), CURRENT_TAB, content::PAGE_TRANSITION_TYPED, false);
   browser_->tab_strip_model()->GetActiveWebContents()->OpenURL(params);
 }
 
 // (URLDropTargetController protocol)
 - (void)dropText:(NSString*)text inView:(NSView*)view at:(NSPoint)point {
   // TODO(viettrungluu): This code is more or less copied from the code in
   // |TabStripController|. I'll refactor this soon to make it common and expand
@@ skipping 19 matching lines @@
 - (void)hideDropURLsIndicatorInView:(NSView*)view {
   // Do nothing.
 }
 
 // (URLDropTargetController protocol)
 - (BOOL)isUnsupportedDropData:(id<NSDraggingInfo>)info {
   return drag_util::IsUnsupportedDropData(profile_, info);
 }
 
 @end