Null check webview() before using it in RenderViewImpl::OnOrientationChange

content/renderer/render_view_impl.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 "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 3006 matching lines @@
   }
 }
 
 void RenderViewImpl::OnMediaPlayerActionAt(const gfx::Point& location,
                                            const WebMediaPlayerAction& action) {
   if (webview())
     webview()->performMediaPlayerAction(action, location);
 }
 
 void RenderViewImpl::OnOrientationChange() {
-  webview()->mainFrame()->toWebLocalFrame()->sendOrientationChangeEvent();
+  if (webview() && webview()->mainFrame()->isWebLocalFrame())
+    webview()->mainFrame()->toWebLocalFrame()->sendOrientationChangeEvent();
 }
 
 void RenderViewImpl::OnPluginActionAt(const gfx::Point& location,
                                       const WebPluginAction& action) {
   if (webview())
     webview()->performPluginAction(action, location);
 }
 
 void RenderViewImpl::OnGetAllSavableResourceLinksForCurrentPage(
     const GURL& page_url) {
@@ skipping 990 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content