Stability instrumentation Crashpad integration

components/crash/content/app/run_as_crashpad_handler_win.h

 // Copyright 2016 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.
 
 #ifndef COMPONENTS_CRASH_CONTENT_APP_RUN_AS_CRASHPAD_HANDLER_WIN_H_
 #define COMPONENTS_CRASH_CONTENT_APP_RUN_AS_CRASHPAD_HANDLER_WIN_H_
 
 namespace base {
 class CommandLine;
+class FilePath;
 }
 
 namespace crash_reporter {
 
 // Helper for running an embedded copy of crashpad_handler. Searches for and
-// removes --(process_type_switch)=xyz arguments in the command line, and all
-// options starting with '/' (for "/prefetch:N"), and then runs
-// crashpad::HandlerMain with the remaining arguments.
+// removes --(process_type_switch|user_data_dir_switch)=xyz arguments in the
+// command line, and all options starting with '/' (for "/prefetch:N"), and then
+// runs crashpad::HandlerMain with the remaining arguments. If user_data_dir is
+// non-empty, a Crashpad extension to collect stability instrumentation on crash
+// is used.
 //
-// Normally, pass switches::kProcessType for process_type_switch. It's accepted
-// as a parameter because this component does not have access to content/, where
-// that variable lives.
+// Normally, pass switches::kProcessType and switches::kCrashpadHandler for
+// process_type_switch and user_data_dir_switch. These are accepted as
+// parameters because this component does not have access to content/, where
+// those variables live.
 int RunAsCrashpadHandler(const base::CommandLine& command_line,
-                         const char* process_type_switch);
+                         const base::FilePath& user_data_dir,
+                         const char* process_type_switch,
+                         const char* user_data_dir_switch);
 
 }  // namespace crash_reporter
 
 #endif  // COMPONENTS_CRASH_CONTENT_APP_RUN_AS_CRASHPAD_HANDLER_WIN_H_