[heap] Cleanup and fix GC flags / add testing infra

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 7295 matching lines @@
 
   // The second script uses forEach.
   const char* script_2 = "[0].forEach(function() { });";
   CompileRun(script_2);
 
   v8::Debug::SetDebugEventListener(NULL);
 }
 
 
 // Import from test-heap.cc
+namespace v8 {
+namespace internal {
+
 int CountNativeContexts();
+}
+}
 
 
 static void NopListener(const v8::Debug::EventDetails& event_details) {
 }
 
 
 TEST(DebuggerCreatesContextIffActive) {
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
-  CHECK_EQ(1, CountNativeContexts());
+  CHECK_EQ(1, v8::internal::CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NULL);
   CompileRun("debugger;");
-  CHECK_EQ(1, CountNativeContexts());
+  CHECK_EQ(1, v8::internal::CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NopListener);
   CompileRun("debugger;");
-  CHECK_EQ(2, CountNativeContexts());
+  CHECK_EQ(2, v8::internal::CountNativeContexts());
 
   v8::Debug::SetDebugEventListener(NULL);
 }
 
 
 TEST(LiveEditEnabled) {
   v8::internal::FLAG_allow_natives_syntax = true;
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
   v8::Debug::SetLiveEditEnabled(env->GetIsolate(), true);
@@ skipping 267 matching lines @@
       "let y = 2;               \n"
       "debugger;                \n"
       "x * y",
       30);
   ExpectInt32(
       "x = 1; y = 2; \n"
       "debugger;"
       "x * y",
       30);
 }