Remove useless DesktopWindowTreeHostWin::HandleTooltipMouseMove()

ui/views/win/hwnd_message_handler.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 "ui/views/win/hwnd_message_handler.h"
 
 #include <dwmapi.h>
 #include <oleacc.h>
 #include <shellapi.h>
 #include <wtsapi32.h>
@@ skipping 2368 matching lines @@
     // be WM_RBUTTONUP instead of WM_NCRBUTTONUP.
     SetCapture();
   }
   long message_time = GetMessageTime();
   MSG msg = { hwnd(), message, w_param, l_param, message_time,
               { CR_GET_X_LPARAM(l_param), CR_GET_Y_LPARAM(l_param) } };
   ui::MouseEvent event(msg);
   if (IsSynthesizedMouseMessage(message, message_time, l_param))
     event.set_flags(event.flags() | ui::EF_FROM_TOUCH);
 
-  if (!(event.flags() & ui::EF_IS_NON_CLIENT))
-    delegate_->HandleTooltipMouseMove(message, w_param, l_param);
-
   if (event.type() == ui::ET_MOUSE_MOVED && !HasCapture() && track_mouse) {
     // Windows only fires WM_MOUSELEAVE events if the application begins
     // "tracking" mouse events for a given HWND during WM_MOUSEMOVE events.
     // We need to call |TrackMouseEvents| to listen for WM_MOUSELEAVE.
     TrackMouseEvents((message == WM_NCMOUSEMOVE) ?
         TME_NONCLIENT | TME_LEAVE : TME_LEAVE);
   } else if (event.type() == ui::ET_MOUSE_EXITED) {
     // Reset our tracking flags so future mouse movement over this
     // NativeWidget results in a new tracking session. Fall through for
     // OnMouseEvent.
@@ skipping 41 matching lines @@
     POINT cursor_pos = {0};
     ::GetCursorPos(&cursor_pos);
     if (memcmp(&cursor_pos, &mouse_location, sizeof(POINT)))
       return false;
     return true;
   }
   return false;
 }
 
 }  // namespace views