components: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/browser/devtools/browser_devtools_agent_host.cc

Index: content/browser/devtools/browser_devtools_agent_host.cc
diff --git a/content/browser/devtools/browser_devtools_agent_host.cc b/content/browser/devtools/browser_devtools_agent_host.cc
index 287a21af150f15a9cc47a23f10f27d10d0f9d7ba..e7dbaa60098095004a5e85df64d6306249d4c435 100644
--- a/content/browser/devtools/browser_devtools_agent_host.cc
+++ b/content/browser/devtools/browser_devtools_agent_host.cc
@@ -13,17 +13,18 @@
 namespace content {
 
 scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::CreateForBrowser(
-    scoped_refptr<base::MessageLoopProxy> tethering_message_loop,
+    scoped_refptr<base::SingleThreadTaskRunner> tethering_task_runner,
     const CreateServerSocketCallback& socket_callback) {
-  return new BrowserDevToolsAgentHost(tethering_message_loop, socket_callback);
+  return new BrowserDevToolsAgentHost(tethering_task_runner, socket_callback);
 }
 
 BrowserDevToolsAgentHost::BrowserDevToolsAgentHost(
-    scoped_refptr<base::MessageLoopProxy> tethering_message_loop,
+    scoped_refptr<base::SingleThreadTaskRunner> tethering_task_runner,
     const CreateServerSocketCallback& socket_callback)
     : system_info_handler_(new devtools::system_info::SystemInfoHandler()),
-      tethering_handler_(new devtools::tethering::TetheringHandler(
-          socket_callback, tethering_message_loop)),
+      tethering_handler_(
+          new devtools::tethering::TetheringHandler(socket_callback,
+                                                    tethering_task_runner)),
       tracing_handler_(new devtools::tracing::TracingHandler(
           devtools::tracing::TracingHandler::Browser)),
       protocol_handler_(new DevToolsProtocolHandler(