Drop queued IPC messages if the child process dies while spawning

content/browser/child_process_launcher.cc

Index: content/browser/child_process_launcher.cc
diff --git a/content/browser/child_process_launcher.cc b/content/browser/child_process_launcher.cc
index 7bf4f492bb3250b332161d3047929a7b81787114..24fd73721846b21a9a9b63a390c4940ac8a472ac 100644
--- a/content/browser/child_process_launcher.cc
+++ b/content/browser/child_process_launcher.cc
@@ -98,6 +98,12 @@ class ChildProcessLauncher::Context
 
   void SetProcessBackgrounded(bool background);
 
+  Client* ReplaceClientForTest(Client* client) {
+    Client* ret = client_;
+    client_ = client;
+    return ret;
+  }
+
  private:
   friend class base::RefCountedThreadSafe<ChildProcessLauncher::Context>;
 
@@ -623,4 +629,9 @@ void ChildProcessLauncher::SetTerminateChildOnShutdown(
     context_->set_terminate_child_on_shutdown(terminate_on_shutdown);
 }
 
+ChildProcessLauncher::Client* ChildProcessLauncher::ReplaceClientForTest(
+    Client* client) {
+  return context_->ReplaceClientForTest(client);
+}
+
 }  // namespace content