Convert UtilityProcessHost to bootstrap Mojo Channel using the Shell connection

content/common/child_process_host_impl.cc

Index: content/common/child_process_host_impl.cc
diff --git a/content/common/child_process_host_impl.cc b/content/common/child_process_host_impl.cc
index 1dc475da37204b298226e7500c7f1b674a74a6e3..b1690914ec6d57869523152e46e08c2977efef37 100644
--- a/content/common/child_process_host_impl.cc
+++ b/content/common/child_process_host_impl.cc
@@ -146,6 +146,13 @@ std::string ChildProcessHostImpl::CreateChannelMojo(
   return channel_id_;
 }
 
+bool ChildProcessHostImpl::CreateChannelMojoWithBootstrap(
+    mojo::ScopedMessagePipeHandle handle) {
+  channel_ = IPC::ChannelMojo::Create(std::move(handle),
+                                      IPC::Channel::MODE_SERVER, this);
+  return channel_ && InitChannel();
+}
+
 std::string ChildProcessHostImpl::CreateChannel() {
   DCHECK(channel_id_.empty());
   channel_id_ = IPC::Channel::GenerateVerifiedChannelID(std::string());