Enable crashpad for Mac

headless/lib/headless_content_main_delegate.h

Index: headless/lib/headless_content_main_delegate.h
diff --git a/headless/lib/headless_content_main_delegate.h b/headless/lib/headless_content_main_delegate.h
index 0aca886cbbe5eca36fb970bc2c372b25f84d3103..d7b9faf8b830821667b68706392e972837c73f43 100644
--- a/headless/lib/headless_content_main_delegate.h
+++ b/headless/lib/headless_content_main_delegate.h
@@ -53,6 +53,10 @@ class HEADLESS_EXPORT HeadlessContentMainDelegate
 
   void InitLogging(const base::CommandLine& command_line);
   void InitCrashReporter(const base::CommandLine& command_line);
+#if defined(OS_MACOSX)
+  void InitMacCrashReporter(const base::CommandLine& command_line,
+                            const std::string& process_type);
+#endif
   static void InitializeResourceBundle();
 
   static HeadlessContentMainDelegate* GetInstance();