[Coverity] Fix uninitialized member

chrome/browser/ui/views/extensions/shell_window_views.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 "chrome/browser/ui/views/extensions/shell_window_views.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/common/extensions/draggable_region.h"
 #include "chrome/common/extensions/extension.h"
@@ skipping 78 matching lines @@
   views::ImageButton* close_button_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellWindowFrameView);
 };
 
 const char ShellWindowFrameView::kViewClassName[] =
     "browser/ui/views/extensions/ShellWindowFrameView";
 
 ShellWindowFrameView::ShellWindowFrameView(ShellWindowViews* window)
     : window_(window),
+      frame_(NULL),
       close_button_(NULL) {
 }
 
 ShellWindowFrameView::~ShellWindowFrameView() {
 }
 
 void ShellWindowFrameView::Init(views::Widget* frame) {
   frame_ = frame;
 
   if (!window_->frameless()) {
@@ skipping 470 matching lines @@
   OnViewWasResized();
 }
 
 // static
 ShellWindow* ShellWindow::CreateImpl(Profile* profile,
                                      const extensions::Extension* extension,
                                      const GURL& url,
                                      const ShellWindow::CreateParams& params) {
   return new ShellWindowViews(profile, extension, url, params);
 }