Add flags and skeleton for profiling process.

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 <stdint.h>
 
 #include "base/command_line.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "chrome/app/chrome_main_delegate.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/features.h"
+#include "chrome/profiling/profiling_main.h"
 #include "content/public/app/content_main.h"
 #include "content/public/common/content_switches.h"
 #include "headless/public/headless_shell.h"
 #include "ui/gfx/switches.h"
 
 #if BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
 #include "services/service_manager/runner/common/client_util.h"
 #endif
 
 #if defined(OS_MACOSX)
@@ skipping 62 matching lines @@
     base::debug::DumpWithoutCrashing();
 #else
   params.argc = argc;
   params.argv = argv;
   base::CommandLine::Init(params.argc, params.argv);
 #endif  // defined(OS_WIN)
   base::CommandLine::Init(0, nullptr);
   const base::CommandLine* command_line(base::CommandLine::ForCurrentProcess());
   ALLOW_UNUSED_LOCAL(command_line);
 
+  // Chrome-specific process modes.
 #if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_WIN)
   if (command_line->HasSwitch(switches::kHeadless)) {
 #if defined(OS_MACOSX)
     SetUpBundleOverrides();
 #endif
     return headless::HeadlessShellMain(params);
   }
 #endif  // defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_WIN)
 
+#if BUILDFLAG(ENABLE_OOP_HEAP_PROFILING)
+  if (command_line->GetSwitchValueASCII(switches::kProcessType) ==
+      "profiling") {
+    return profiling::ProfilingMain(*command_line);
+  }
+#endif  // ENABLE_OOP_HEAP_PROFILING
+
 #if defined(OS_CHROMEOS) && BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
   if (service_manager::ServiceManagerIsRemote())
     params.env_mode = aura::Env::Mode::MUS;
 #endif  // BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
 
   int rv = content::ContentMain(params);
 
 #if defined(OS_WIN)
   base::win::SetShouldCrashOnProcessDetach(false);
 #endif
 
   return rv;
 }