Use WaitForDebuggerChildren to let renderer wait for gdb

content/browser/renderer_host/render_process_host_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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 621 matching lines @@
     g_in_process_thread = in_process_renderer_->message_loop();
 
     OnProcessLaunched();  // Fake a callback that the process is ready.
   } else {
     // Build command line for renderer.  We call AppendRendererCommandLine()
     // first so the process type argument will appear first.
     base::CommandLine* cmd_line = new base::CommandLine(renderer_path);
     if (!renderer_prefix.empty())
       cmd_line->PrependWrapper(renderer_prefix);
     AppendRendererCommandLine(cmd_line);
+
+    if (browser_command_line.HasSwitch(switches::kRendererWaitForDebugger))
+      cmd_line->AppendSwitch(switches::kWaitForDebugger);

[Charlie Reis, 2014/08/29 00:04:24]

This belongs in PropagateBrowserCommandLineToRenderer, not here.

[Jaekyun Seok (inactive), 2014/08/29 01:05:07]

Done.

+
     cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
 
     // Spawn the child process asynchronously to avoid blocking the UI thread.
     // As long as there's no renderer prefix, we can use the zygote process
     // at this stage.
     child_process_launcher_.reset(new ChildProcessLauncher(
         new RendererSandboxedProcessLauncherDelegate(channel_.get()),
         cmd_line,
         GetID(),
         this));
@@ skipping 1701 matching lines @@
 }
 
 void RenderProcessHostImpl::OnDeletedGpuMemoryBuffer(
     gfx::GpuMemoryBufferType type,
     const gfx::GpuMemoryBufferId& id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   GpuMemoryBufferImpl::DeletedByChildProcess(type, id, GetHandle());
 }
 
 }  // namespace content