Remove duplication between Mandoline and mojo_runner main functions.

mojo/runner/desktop/launcher_process.cc

 // Copyright 2013 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 <stdio.h>
 #include <string.h>
 
 #include <algorithm>
 #include <iostream>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/synchronization/waitable_event.h"
-#include "base/trace_event/trace_event.h"
-#include "components/tracing/trace_config_file.h"
 #include "mojo/runner/context.h"
 #include "mojo/runner/switches.h"
 #include "mojo/shell/switches.h"
 
 namespace mojo {
 namespace runner {
 
-int LauncherProcessMain(int argc, char** argv) {
-  mojo::runner::Tracer tracer;
+int LauncherProcessMain(const GURL& mojo_url, const base::Closure& callback) {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (!command_line->HasSwitch(switches::kMojoSingleProcess) &&
       !command_line->HasSwitch("gtest_list_tests"))
     command_line->AppendSwitch(switches::kEnableMultiprocess);
   command_line->AppendSwitch("use-new-edk");
   // http://crbug.com/546644
   command_line->AppendSwitch(switches::kMojoNoSandbox);
 
   // We want the shell::Context to outlive the MessageLoop so that pipes are
   // all gracefully closed / error-out before we try to shut the Context down.
   Context shell_context;
   {
     base::MessageLoop message_loop;
     base::FilePath shell_dir;
     PathService::Get(base::DIR_MODULE, &shell_dir);
-    if (!shell_context.Init(shell_dir)) {
+    if (!shell_context.Init(shell_dir))
       return 0;
+
+    if (mojo_url.is_empty()) {
+      message_loop.PostTask(
+          FROM_HERE,
+          base::Bind(&Context::RunCommandLineApplication,
+                     base::Unretained(&shell_context), base::Closure()));
+    } else {
+      message_loop.PostTask(FROM_HERE,
+                            base::Bind(&mojo::runner::Context::Run,
+                                       base::Unretained(&shell_context),
+                                       mojo_url));
     }
-
-    message_loop.PostTask(
-        FROM_HERE,
-        base::Bind(&Context::RunCommandLineApplication,
-                   base::Unretained(&shell_context), base::Closure()));
     message_loop.Run();
 
     // Must be called before |message_loop| is destroyed.
     shell_context.Shutdown();
   }
 
   return 0;
 }
 
 }  // namespace runner
 }  // namespace mojo