Prevent crash when resize is sent to a swapped out main frame

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 <memory>
 
@@ skipping 2662 matching lines @@
 void RenderViewImpl::ResizeWebWidget() {
     webview()->resizeWithTopControls(GetSizeForWebWidget(),
                                      top_controls_height_,
                                      top_controls_shrink_blink_size_);
 }
 
 void RenderViewImpl::OnResize(const ResizeParams& params) {
   TRACE_EVENT0("renderer", "RenderViewImpl::OnResize");
   if (webview()) {
     webview()->hidePopups();
-    if (send_preferred_size_changes_) {
+    if (send_preferred_size_changes_ &&
+        webview()->mainFrame()->isWebLocalFrame()) {
       webview()->mainFrame()->setCanHaveScrollbars(
           ShouldDisplayScrollbars(params.new_size.width(),
                                   params.new_size.height()));
     }
     if (display_mode_ != params.display_mode) {
       display_mode_ = params.display_mode;
       webview()->setDisplayMode(display_mode_);
     }
   }
 
@@ skipping 697 matching lines @@
         return render_frame->focused_pepper_plugin();
     }
     frame = frame->traverseNext(false);
   }
 
   return nullptr;
 }
 #endif
 
 }  // namespace content