not everyone has this header

--- a/src/third_party/chromium/src/base/debug/debugger_posix.cc
+++ b/src/third_party/chromium/src/base/debug/debugger_posix.cc
@@ -17,10 +17,6 @@
 #include <string>
 #include <vector>
 
-#if !defined(OS_ANDROID) && !defined(OS_NACL)
-#include <execinfo.h>
-#endif
-
 #if defined(__GLIBCXX__)
 #include <cxxabi.h>
 #endif
--- a/src/third_party/chromium/src/base/debug/stack_trace_posix.cc
+++ b/src/third_party/chromium/src/base/debug/stack_trace_posix.cc
@@ -5,7 +5,12 @@
 #include "base/debug/stack_trace.h"
 
 #include <errno.h>
+#if defined(__GLIBC__) && !defined(__UCLIBC__)
 #include <execinfo.h>
+#else
+#define backtrace(array, size) 0
+#define backtrace_symbols(array, size) NULL
+#endif
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>