Crash on channel error in single-process mode.

content/renderer/render_thread_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_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 1610 matching lines @@
 
 std::unique_ptr<base::SharedMemory> RenderThreadImpl::AllocateSharedMemory(
     size_t size) {
   return HostAllocateSharedMemoryBuffer(size);
 }
 
 void RenderThreadImpl::DoNotNotifyWebKitOfModalLoop() {
   notify_webkit_of_modal_loop_ = false;
 }
 
+void RenderThreadImpl::OnChannelError() {
+  // In single-process mode, the renderer can't be restarted after shutdown.
+  // So, if we get a channel error, crash the whole process right now to get a
+  // more informative stack, since we will otherwise just crash later when we
+  // try to restart it.
+  CHECK(!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSingleProcess));
+  ChildThreadImpl::OnChannelError();
+}
+
 bool RenderThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
   base::ObserverListBase<RenderThreadObserver>::Iterator it(&observers_);
   RenderThreadObserver* observer;
   while ((observer = it.GetNext()) != NULL) {
     if (observer->OnControlMessageReceived(msg))
       return true;
   }
 
   // Some messages are handled by delegates.
   if (appcache_dispatcher_->OnMessageReceived(msg) ||
@@ skipping 409 matching lines @@
       v8_memory_pressure_level == v8::MemoryPressureLevel::kCritical)
     v8_memory_pressure_level = v8::MemoryPressureLevel::kModerate;
 
   blink::mainThreadIsolate()->MemoryPressureNotification(
       v8_memory_pressure_level);
   blink::MemoryPressureNotificationToWorkerThreadIsolates(
       v8_memory_pressure_level);
 }
 
 }  // namespace content