Bug 1511140 - Declare PRINT_MACH_RESULT only once r=Ehsan

Differential Revision: https://phabricator.services.mozilla.com/D13458

--HG--
extra : moz-landing-system : lando

ipc/chromium/src/chrome/common/mach_ipc_mac.h

@@ -67,8 +67,10 @@
 //    kern_return_t result = sender.SendMessage(message, 1000);
 //
 
+#ifndef PRINT_MACH_RESULT
 #define PRINT_MACH_RESULT(result_, message_) \
   printf(message_" %s (%d)\n", mach_error_string(result_), result_ );
+#endif
 
 //==============================================================================
 // A wrapper class for mach_msg_port_descriptor_t (with same memory layout)

toolkit/crashreporter/google-breakpad/src/common/mac/MachIPC.h

@@ -95,8 +95,10 @@
 //
 
 namespace google_breakpad {
+#ifndef PRINT_MACH_RESULT
 #define PRINT_MACH_RESULT(result_, message_) \
   printf(message_" %s (%d)\n", mach_error_string(result_), result_ );
+#endif
 
 //==============================================================================
 // A wrapper class for mach_msg_port_descriptor_t (with same memory layout)