mac: Add CrashpadClient::UseSystemDefaultHandler()

client/crashpad_client.h

Index: client/crashpad_client.h
diff --git a/client/crashpad_client.h b/client/crashpad_client.h
index 7095de0403e68f0edcc780e3bd66e84ddc110b90..9ed2aea5ea45f8442eebcdaf3d0b8c1966ced274 100644
--- a/client/crashpad_client.h
+++ b/client/crashpad_client.h
@@ -122,6 +122,30 @@ class CrashpadClient {
   //! \return `true` on success, `false` on failure with a message logged.
   bool UseHandler();
 
+#if defined(OS_MACOSX) || DOXYGEN
+  //! \brief Configures the process to direct its crashes to the default handler
+  //!     for the operating system.
+  //!
+  //! On OS X, this sets the task’s exception port as in UseHandler(), but the
+  //! exception handler used is obtained from SystemCrashReporterHandler(). If
+  //! the system’s crash reporter handler cannot be determined, the task’s
+  //! exception ports for crash-type exceptions are cleared.
+  //!
+  //! Use of this function is strongly discouraged.
+  //!
+  //! \warning After a successful call to this function, Crashpad will no longer
+  //!     monitor the process for crashes until a subsequent call to
+  //!     UseHandler().
+  //!
+  //! \note This is provided as a static function to allow it to be used in
+  //!     situations where a CrashpadClient object is not otherwise available.
+  //!     This may be useful when a child process inherits its parent’s Crashpad
+  //!     handler, but wants to sever this tie.
+  //!
+  //! \return `true` on success, `false` on failure with a message logged.
+  static bool UseSystemDefaultHandler();
+#endif
+
  private:
 #if defined(OS_MACOSX)
   base::mac::ScopedMachSendRight exception_port_;