Convert utility process extension ParseUpdate IPC to mojo

extensions/shell/utility/shell_content_utility_client.cc

Index: extensions/shell/utility/shell_content_utility_client.cc
diff --git a/extensions/shell/utility/shell_content_utility_client.cc b/extensions/shell/utility/shell_content_utility_client.cc
index 5fe8c573ac3b6cfa8b2850fb3d6cd212c829091d..75d72622738965c7496d684ce1d15805f7b385b9 100644
--- a/extensions/shell/utility/shell_content_utility_client.cc
+++ b/extensions/shell/utility/shell_content_utility_client.cc
@@ -6,18 +6,12 @@
 
 namespace extensions {
 
-ShellContentUtilityClient::ShellContentUtilityClient() {
-}
+ShellContentUtilityClient::ShellContentUtilityClient() = default;
 
-ShellContentUtilityClient::~ShellContentUtilityClient() {
-}
+ShellContentUtilityClient::~ShellContentUtilityClient() = default;
 
 void ShellContentUtilityClient::UtilityThreadStarted() {
-  UtilityHandler::UtilityThreadStarted();
-}
-
-bool ShellContentUtilityClient::OnMessageReceived(const IPC::Message& message) {
-  return utility_handler_.OnMessageReceived(message);
+  utility_handler::UtilityThreadStarted();
 }
 
 }  // namespace extensions