Don’t call functions on a possibly-deleted object

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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/browser/frame_host/render_frame_host_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 2925 matching lines @@
 
 void RenderFrameHostImpl::DeleteSurroundingTextInCodePoints(int before,
                                                             int after) {
   Send(new InputMsg_DeleteSurroundingTextInCodePoints(routing_id_, before,
                                                       after));
 }
 
 void RenderFrameHostImpl::JavaScriptDialogClosed(
     IPC::Message* reply_msg,
     bool success,
-    const base::string16& user_input,
-    bool dialog_was_suppressed) {
+    const base::string16& user_input) {
   GetProcess()->SetIgnoreInputEvents(false);
 
   SendJavaScriptDialogReply(reply_msg, success, user_input);
 
   // If executing as part of beforeunload event handling, there may have been
   // timers stopped in this frame or a frame up in the frame hierarchy. Restart
   // any timers that were stopped in OnRunBeforeUnloadConfirm().
   for (RenderFrameHostImpl* frame = this; frame; frame = frame->GetParent()) {
-    if (frame->is_waiting_for_beforeunload_ack_) {
-      // If we are waiting for a beforeunload ack and the user has suppressed
-      // messages, kill the tab immediately. A page that's spamming is
-      // presumably malicious, so there's no point in continuing to run its
-      // script and dragging out the process.
-      if (dialog_was_suppressed) {
-        frame->SimulateBeforeUnloadAck();
-      } else if (frame->beforeunload_timeout_) {
-        frame->beforeunload_timeout_->Start(
-            TimeDelta::FromMilliseconds(RenderViewHostImpl::kUnloadTimeoutMS));
-      }
+    if (frame->is_waiting_for_beforeunload_ack_ &&
+        frame->beforeunload_timeout_) {
+      frame->beforeunload_timeout_->Start(
+          TimeDelta::FromMilliseconds(RenderViewHostImpl::kUnloadTimeoutMS));
     }
   }
 }
 
 void RenderFrameHostImpl::SendJavaScriptDialogReply(
     IPC::Message* reply_msg,
     bool success,
     const base::string16& user_input) {
   FrameHostMsg_RunJavaScriptDialog::WriteReplyParams(reply_msg, success,
                                                      user_input);
@@ skipping 879 matching lines @@
 }
 
 void RenderFrameHostImpl::ForwardGetInterfaceToRenderFrame(
     const std::string& interface_name,
     mojo::ScopedMessagePipeHandle pipe) {
   GetRemoteInterfaces()->GetInterface(interface_name, std::move(pipe));
 }
 #endif
 
 }  // namespace content