content: change SetTooltipText to use string16

BUG=23581

Review URL: http://codereview.chromium.org/7583038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95852 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/render_widget_host.cc

@@ -815,7 +815,7 @@ void RenderWidgetHost::OnMsgClose() {
 }
 
 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
@@ -830,7 +830,7 @@ void RenderWidgetHost::OnMsgSetTooltipText(
   // 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.

content/browser/renderer_host/render_widget_host.h

@@ -444,7 +444,7 @@ class RenderWidgetHost : public IPC::Channel::Listener,
   void OnMsgRenderViewGone(int status, int error_code);
   void OnMsgClose();
   void OnMsgRequestMove(const gfx::Rect& pos);
-  void OnMsgSetTooltipText(const std::wstring& tooltip_text,
+  void OnMsgSetTooltipText(const string16& tooltip_text,
                            WebKit::WebTextDirection text_direction_hint);
   void OnMsgPaintAtSizeAck(int tag, const gfx::Size& size);
   void OnMsgUpdateRect(const ViewHostMsg_UpdateRect_Params& params);

content/common/view_messages.h

@@ -1707,7 +1707,7 @@ IPC_SYNC_MESSAGE_ROUTED1_1(ViewHostMsg_GetScreenInfo,
 
 // Send the tooltip text for the current mouse position to the browser.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_SetTooltipText,
-                    std::wstring /* tooltip text string */,
+                    string16 /* tooltip text string */,
                     WebKit::WebTextDirection /* text direction hint */)
 
 // Notification that the text selection has changed.

content/renderer/render_widget.cc

@@ -1030,8 +1030,7 @@ WebRect RenderWidget::windowRect() {
 
 void RenderWidget::setToolTipText(const WebKit::WebString& text,
                                   WebTextDirection hint) {
-  Send(new ViewHostMsg_SetTooltipText(routing_id_, UTF16ToWideHack(text),
-                                      hint));
+  Send(new ViewHostMsg_SetTooltipText(routing_id_, text, hint));
 }
 
 void RenderWidget::setWindowRect(const WebRect& pos) {