Make panel adjust bounds per preferred size change notification on Windows.

chrome/browser/ui/views/tab_contents/tab_contents_view_touch.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 "chrome/browser/ui/views/tab_contents/tab_contents_view_touch.h"
 
 #include <X11/extensions/XInput2.h>
 #undef Status
 
 #include "base/string_util.h"
@@ skipping 212 matching lines @@
       // no longer be focusable (e.g. if the location bar was focused and then
       // we switched to fullscreen mode).  In that case we default to the
       // default focus.
       SetInitialFocus();
     }
     view_storage->RemoveView(last_focused_view_storage_id_);
   }
 }
 
 void TabContentsViewTouch::UpdatePreferredSize(const gfx::Size& pref_size) {
+  tab_contents_->UpdatePreferredSize(pref_size);
 }
 
 bool TabContentsViewTouch::IsDoingDrag() const {
   return false;
 }
 
 void TabContentsViewTouch::CancelDragAndCloseTab() {
 }
 
 bool TabContentsViewTouch::IsEventTracking() const {
@@ skipping 189 matching lines @@
     rwhv->SetSize(size);
 
   if (needs_resize)
     SetFloatingPosition(size);
 }
 
 void TabContentsViewTouch::SetFloatingPosition(const gfx::Size& size) {
   // TODO(anicolao): rework this once we have WebUI views for dialogs
   SetBounds(x(), y(), size.width(), size.height());
 }