Adds ability for chrome to behave as mojo_runner

chrome/app/chrome_main.cc

 // Copyright (c) 2012 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 "chrome/app/chrome_main_delegate.h"
 
 #include "build/build_config.h"
+#include "chrome/common/features.h"
 #include "content/public/app/content_main.h"
 
+#if BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
+#include "base/command_line.h"
+#include "chrome/app/mash/mash_runner.h"
+#endif
+
 #if defined(OS_WIN)
 #include "base/debug/dump_without_crashing.h"
 #include "base/win/win_util.h"
 #include "chrome/common/chrome_constants.h"
 
 #define DLLEXPORT __declspec(dllexport)
 
 // We use extern C for the prototype DLLEXPORT to avoid C++ name mangling.
 extern "C" {
 DLLEXPORT int __cdecl ChromeMain(HINSTANCE instance,
@@ skipping 37 matching lines @@
   typedef void (__cdecl *DumpProcessFunction)();
   DumpProcessFunction DumpProcess = reinterpret_cast<DumpProcessFunction>(
       ::GetProcAddress(::GetModuleHandle(chrome::kBrowserProcessExecutableName),
           "DumpProcessWithoutCrash"));
   base::debug::SetDumpWithoutCrashingFunction(DumpProcess);
 #else
   params.argc = argc;
   params.argv = argv;
 #endif
 
+#if BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
+#if !defined(OS_WIN)
+  base::CommandLine::Init(params.argc, params.argv);
+#endif
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
+  // TODO(sky): only do this for dev builds and if on canary channel.
+  if (command_line.HasSwitch("mash"))
+    return MashMain();
+#endif
+
   int rv = content::ContentMain(params);
 
 #if defined(OS_WIN)
   base::win::SetShouldCrashOnProcessDetach(false);
 #endif
 
   return rv;
 }