Nukes some dead TooltipManager code

ui/views/widget/aero_tooltip_manager.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/widget/aero_tooltip_manager.h"
 
 #include <windows.h>
 #include <commctrl.h>
 #include <shlobj.h>
 
@@ skipping 34 matching lines @@
     gfx::Point mouse_pos = gfx::win::ScreenToDIPPoint(mouse_pos_in_pixels);
     if (u_msg == WM_NCMOUSEMOVE) {
       // NC message coordinates are in screen coordinates.
       POINT temp = mouse_pos_in_pixels.ToPOINT();
       ::MapWindowPoints(HWND_DESKTOP, GetParent(), &temp, 1);
       mouse_pos_in_pixels.SetPoint(temp.x, temp.y);
       mouse_pos = gfx::win::ScreenToDIPPoint(mouse_pos_in_pixels);
     }
     if (last_mouse_pos_ != mouse_pos) {
       last_mouse_pos_ = mouse_pos;
-      HideKeyboardTooltip();
       UpdateTooltip(mouse_pos);
     }
 
     // Delay opening of the tooltip just in case the user moves their
     // mouse to another control. We defer this from Init because we get
     // zero if we query it too soon.
     if (!initial_delay_) {
       initial_delay_ = static_cast<int>(
           ::SendMessage(tooltip_hwnd_, TTM_GETDELAYTIME, TTDT_INITIAL, 0));
     }
@@ skipping 41 matching lines @@
 void AeroTooltipManager::InitialTimer::Disown() {
   manager_ = NULL;
 }
 
 void AeroTooltipManager::InitialTimer::Execute() {
   if (manager_)
     manager_->OnTimer();
 }
 
 }  // namespace views