Create a internal, global native context used only for generated code stubs

test/cctest/test-debug.cc

Index: test/cctest/test-debug.cc
diff --git a/test/cctest/test-debug.cc b/test/cctest/test-debug.cc
index a6ffdca179767b44424d1a3604acbf2020b8c5c0..c247f9a3b5c1c6e9e92addc81ff2c0acb99ec613 100644
--- a/test/cctest/test-debug.cc
+++ b/test/cctest/test-debug.cc
@@ -7341,15 +7341,15 @@ static void NopListener(const v8::Debug::EventDetails& event_details) {
 TEST(DebuggerCreatesContextIffActive) {
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
-  CHECK_EQ(1, CountNativeContexts());
+  CHECK_EQ(2, CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NULL);
   CompileRun("debugger;");
-  CHECK_EQ(1, CountNativeContexts());
+  CHECK_EQ(2, CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NopListener);
   CompileRun("debugger;");
-  CHECK_EQ(2, CountNativeContexts());
+  CHECK_EQ(3, CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NULL);
 }