Drop queued IPC messages if the child process dies while spawning

content/browser/child_process_launcher.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/browser/child_process_launcher.h"
 
 #include <utility>  // For std::pair.
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 80 matching lines @@
   void set_terminate_child_on_shutdown(bool terminate_on_shutdown) {
     terminate_child_on_shutdown_ = terminate_on_shutdown;
   }
 
   void UpdateTerminationStatus(bool known_dead);
 
   void Close() { process_.Close(); }
 
   void SetProcessBackgrounded(bool background);
 
+  Client* ReplaceClientForTest(Client* client) {
+    Client* ret = client_;
+    client_ = client;
+    return ret;
+  }
+
  private:
   friend class base::RefCountedThreadSafe<ChildProcessLauncher::Context>;
 
   ~Context() {
     Terminate();
   }
 
   static void RecordHistograms(base::TimeTicks begin_launch_time);
   static void RecordLaunchHistograms(base::TimeDelta launch_time);
 
@@ skipping 505 matching lines @@
 void ChildProcessLauncher::SetProcessBackgrounded(bool background) {
   context_->SetProcessBackgrounded(background);
 }
 
 void ChildProcessLauncher::SetTerminateChildOnShutdown(
     bool terminate_on_shutdown) {
   if (context_.get())
     context_->set_terminate_child_on_shutdown(terminate_on_shutdown);
 }
 
+ChildProcessLauncher::Client* ChildProcessLauncher::ReplaceClientForTest(
+    Client* client) {
+  return context_->ReplaceClientForTest(client);
+}
+
 }  // namespace content