$OpenBSD: patch-third_party_WebKit_Source_platform_heap_StackFrameDepth_cpp,v 1.11 2017/09/09 19:16:43 robert Exp $
Index: third_party/WebKit/Source/platform/heap/StackFrameDepth.cpp
--- third_party/WebKit/Source/platform/heap/StackFrameDepth.cpp.orig
+++ third_party/WebKit/Source/platform/heap/StackFrameDepth.cpp
@@ -15,6 +15,11 @@
 extern "C" void* __libc_stack_end;  // NOLINT
 #endif
 
+#if defined(OS_OPENBSD)
+#include <sys/signal.h>
+#include <pthread_np.h>
+#endif
+
 namespace blink {
 
 static const char* g_avoid_optimization = nullptr;
