Use explicit WebString conversions in LayoutTest related files

content/test/layouttest_support.cc

 // 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.
 
 #include "content/public/test/layouttest_support.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/callback.h"
@@ skipping 523 matching lines @@
 }
 
 void DisableAutoResizeMode(RenderView* render_view, const WebSize& new_size) {
   static_cast<RenderViewImpl*>(render_view)->
       DisableAutoResizeForTesting(new_size);
 }
 
 // Returns True if node1 < node2.
 bool HistoryEntryCompareLess(HistoryEntry::HistoryNode* node1,
                              HistoryEntry::HistoryNode* node2) {
-  base::string16 target1 = node1->item().target();
-  base::string16 target2 = node2->item().target();
+  base::string16 target1 = node1->item().target().utf16();
+  base::string16 target2 = node2->item().target().utf16();
   return base::CompareCaseInsensitiveASCII(target1, target2) < 0;
 }
 
 std::string DumpHistoryItem(HistoryEntry::HistoryNode* node,
                             int indent,
                             bool is_current_index) {
   std::string result;
 
   const blink::WebHistoryItem& item = node->item();
   if (is_current_index) {
@@ skipping 46 matching lines @@
 }
 
 void ForceTextInputStateUpdateForRenderFrame(RenderFrame* frame) {
   if (auto* render_widget =
           static_cast<RenderFrameImpl*>(frame)->GetRenderWidget()) {
     render_widget->ShowVirtualKeyboard();
   }
 }
 
 }  // namespace content