Enable/disable LiveEdit using the (C++) debug API.

test/cctest/test-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7402 matching lines @@
   CompileRun("debugger;");
   CHECK_EQ(1, CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NopListener);
   CompileRun("debugger;");
   CHECK_EQ(2, CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NULL);
 }
 
+
+TEST(LiveEditEnabled) {
+  v8::internal::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+  LocalContext context;
+  v8::Debug::SetLiveEditEnabled(true);
+  CompileRun("%LiveEditCompareStrings('', '')");
+}
+
+
+TEST(LiveEditDisabled) {
+  v8::internal::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+  LocalContext context;
+  v8::Debug::SetLiveEditEnabled(false);
+  CompileRun("%LiveEditCompareStrings('', '')");
+}
+
+
 #endif  // ENABLE_DEBUGGER_SUPPORT