Use explicit WebString conversions in clipboard and drag-and-drop code

content/renderer/clipboard_utils.cc

 // Copyright 2013 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 "content/renderer/clipboard_utils.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "net/base/escape.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 
 namespace content {
 
 std::string URLToMarkup(const blink::WebURL& url,
                         const blink::WebString& title) {
   std::string markup("<a href=\"");
   markup.append(url.string().utf8());
   markup.append("\">");
   // TODO(darin): HTML escape this
-  markup.append(
-      net::EscapeForHTML(base::UTF16ToUTF8(base::StringPiece16(title))));
+  markup.append(net::EscapeForHTML(title.utf8()));
   markup.append("</a>");
   return markup;
 }
 
 std::string URLToImageMarkup(const blink::WebURL& url,
                              const blink::WebString& title) {
   std::string markup("<img src=\"");
   markup.append(net::EscapeForHTML(url.string().utf8()));
   markup.append("\"");
   if (!title.isEmpty()) {
     markup.append(" alt=\"");
-    markup.append(
-        net::EscapeForHTML(base::UTF16ToUTF8(base::StringPiece16(title))));
+    markup.append(net::EscapeForHTML(title.utf8()));
     markup.append("\"");
   }
   markup.append("/>");
   return markup;
 }
 
 }  // namespace content