Rename "global context" to "native context",

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 6ac882da02262ecba4f646bf01123570b1026e6e..8cbb753ee576408f7203291e74f771fac7ccfbf4 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -559,8 +559,8 @@ DEFINE_bool(gc_verbose, false, "print stuff during garbage collection")
 DEFINE_bool(heap_stats, false, "report heap statistics before and after GC")
 DEFINE_bool(code_stats, false, "report code statistics after GC")
 DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC")
-DEFINE_bool(verify_global_context_separation, false,
-            "verify that code holds on to at most one global context after GC")
+DEFINE_bool(verify_native_context_separation, false,
+            "verify that code holds on to at most one native context after GC")
 DEFINE_bool(print_handles, false, "report handles after GC")
 DEFINE_bool(print_global_handles, false, "report global handles after GC")