Fix missing backing store in Linux.

chrome/browser/tab_contents/web_contents_view_win.cc

 // Copyright (c) 2006-2008 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/tab_contents/web_contents_view_win.h"
 
 #include <windows.h>
 
 #include "chrome/browser/bookmarks/bookmark_drag_data.h"
 #include "chrome/browser/browser.h"  // TODO(beng): this dependency is awful.
@@ skipping 277 matching lines @@
       // if the location bar was focused and the tab is dragged out), or it may
       // 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 WebContentsViewWin::SetChildSize(RenderWidgetHostView* rwh_view) {
+  rwh_view->SetSize(GetContainerSize());
+}
+
 void WebContentsViewWin::UpdateDragCursor(bool is_drop_target) {
   drop_target_->set_is_drop_target(is_drop_target);
 }
 
 void WebContentsViewWin::TakeFocus(bool reverse) {
   views::FocusManager* focus_manager =
       views::FocusManager::GetFocusManager(GetNativeView());
 
   // We may not have a focus manager if the tab has been switched before this
   // message arrived.
@@ skipping 282 matching lines @@
   }
   return false;
 }
 
 void WebContentsViewWin::WheelZoom(int distance) {
   if (web_contents()->delegate()) {
     bool zoom_in = distance > 0;
     web_contents()->delegate()->ContentsZoomChange(zoom_in);
   }
 }