Print stack traces in child processes when browser tests failed.

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 <vector>
@@ skipping 1030 matching lines @@
   child_resource_message_filter()->SetMainThreadTaskRunner(resource_task_queue);
   resource_dispatcher()->SetMainThreadTaskRunner(resource_task_queue);
 }
 
 void RenderThreadImpl::EnsureWebKitInitialized() {
   if (blink_platform_impl_)
     return;
 
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch("crash-renderer"))
+    CHECK(false) << "crash-renderer specified";
 
 #ifdef ENABLE_VTUNE_JIT_INTERFACE
   if (command_line.HasSwitch(switches::kEnableVtune))
     gin::Debug::SetJitCodeEventHandler(vTune::GetVtuneCodeEventHandler());
 #endif
 
   SetRuntimeFeaturesDefaultsAndUpdateFromArgs(command_line);
 
   blink_platform_impl_.reset(
       new RendererBlinkPlatformImpl(renderer_scheduler_.get()));
@@ skipping 882 matching lines @@
 }
 
 void RenderThreadImpl::PendingRenderFrameConnect::OnConnectionError() {
   size_t erased =
       RenderThreadImpl::current()->pending_render_frame_connects_.erase(
           routing_id_);
   DCHECK_EQ(1u, erased);
 }
 
 }  // namespace content