content: change SetTooltipText to use string16

content/browser/renderer_host/render_widget_host.cc

 // Copyright (c) 2011 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/browser/renderer_host/render_widget_host.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/i18n/rtl.h"
@@ skipping 797 matching lines @@
   // Is that really what we want in response to this message?  I'm matching
   // previous behavior of the code here.
   Destroy();
 }
 
 void RenderWidgetHost::OnMsgClose() {
   Shutdown();
 }
 
 void RenderWidgetHost::OnMsgSetTooltipText(
-    const std::wstring& tooltip_text,
+    const string16& tooltip_text,
     WebTextDirection text_direction_hint) {
   // First, add directionality marks around tooltip text if necessary.
   // A naive solution would be to simply always wrap the text. However, on
   // windows, Unicode directional embedding characters can't be displayed on
   // systems that lack RTL fonts and are instead displayed as empty squares.
   //
   // To get around this we only wrap the string when we deem it necessary i.e.
   // when the locale direction is different than the tooltip direction hint.
   //
   // Currently, we use element's directionality as the tooltip direction hint.
   // An alternate solution would be to set the overall directionality based on
   // trying to detect the directionality from the tooltip text rather than the
   // element direction.  One could argue that would be a preferable solution
   // but we use the current approach to match Fx & IE's behavior.
-  string16 wrapped_tooltip_text = WideToUTF16(tooltip_text);
+  string16 wrapped_tooltip_text = tooltip_text;
   if (!tooltip_text.empty()) {
     if (text_direction_hint == WebKit::WebTextDirectionLeftToRight) {
       // Force the tooltip to have LTR directionality.
       wrapped_tooltip_text =
           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
     } else if (text_direction_hint == WebKit::WebTextDirectionRightToLeft &&
                !base::i18n::IsRTL()) {
       // Force the tooltip to have RTL directionality.
       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
     }
@@ skipping 359 matching lines @@
     view_->CreatePluginContainer(deferred_plugin_handles_[i]);
 #endif
   }
 
   deferred_plugin_handles_.clear();
 }
 
 void RenderWidgetHost::StartUserGesture() {
   OnUserGesture();
 }