Add flags and skeleton for profiling process.

chrome/app/chrome_main.cc

Index: chrome/app/chrome_main.cc
diff --git a/chrome/app/chrome_main.cc b/chrome/app/chrome_main.cc
index aec129c9bd1b72991d0c4e482c2c41e3e91b47e5..912469dbe5435b735c6fbe86a47c82f5e3ad75e4 100644
--- a/chrome/app/chrome_main.cc
+++ b/chrome/app/chrome_main.cc
@@ -10,6 +10,7 @@
 #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"
@@ -92,6 +93,7 @@ int ChromeMain(int argc, const char** argv) {
   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)
@@ -101,6 +103,13 @@ int ChromeMain(int argc, const char** argv) {
   }
 #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;