Update uses of UTF conversions in content/ to use the base:: namespace.

content/browser/web_contents/web_drag_source_mac.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 "content/browser/web_contents/web_drag_source_mac.h"
 
 #include <sys/param.h>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 129 matching lines @@
   contentsView_ = nil;
 }
 
 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal {
   return dragOperationMask_;
 }
 
 - (void)lazyWriteToPasteboard:(NSPasteboard*)pboard forType:(NSString*)type {
   // NSHTMLPboardType requires the character set to be declared. Otherwise, it
   // assumes US-ASCII. Awesome.
-  const base::string16 kHtmlHeader = ASCIIToUTF16(
+  const base::string16 kHtmlHeader = base::ASCIIToUTF16(
       "<meta http-equiv=\"Content-Type\" content=\"text/html;charset=UTF-8\">");
 
   // Be extra paranoid; avoid crashing.
   if (!dropData_) {
     NOTREACHED();
     return;
   }
 
   // HTML.
   if ([type isEqualToString:NSHTMLPboardType] ||
@@ skipping 229 matching lines @@
       base::FilePath fileName;
       if (content::ParseDownloadMetadata(
               dropData_->download_metadata,
               &mimeType16,
               &fileName,
               &downloadURL_)) {
         // Generate the file name based on both mime type and proposed file
         // name.
         std::string defaultName =
             content::GetContentClient()->browser()->GetDefaultDownloadName();
-        mimeType = UTF16ToUTF8(mimeType16);
+        mimeType = base::UTF16ToUTF8(mimeType16);
         downloadFileName_ =
             net::GenerateFileName(downloadURL_,
                                   std::string(),
                                   std::string(),
                                   fileName.value(),
                                   mimeType,
                                   defaultName);
       }
     }
 
@@ skipping 69 matching lines @@
 - (NSImage*)dragImage {
   if (dragImage_)
     return dragImage_;
 
   // Default to returning a generic image.
   return content::GetContentClient()->GetNativeImageNamed(
       IDR_DEFAULT_FAVICON).ToNSImage();
 }
 
 @end  // @implementation WebDragSource (Private)