Unify the way cctest initalizes the VM for each test case.

test/cctest/cctest.cc

 // Copyright 2008 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 39 matching lines @@
   char *extension = strrchr(basename, '.');
   if (extension) *extension = 0;
   // Install this test in the list of tests
   file_ = basename;
   enabled_ = enabled;
   prev_ = last_;
   last_ = this;
 }
 
 
+v8::Persistent<v8::Context> CcTest::context_;
+
+
+void CcTest::InitializeVM(CcTestExtensionFlags extensions) {
+  const char* extension_names[kMaxExtensions];
+  int extension_count = 0;
+#define CHECK_EXTENSION_FLAG(Name, Id) \
+  if (extensions.Contains(Name##_ID)) extension_names[extension_count++] = Id;
+  EXTENSION_LIST(CHECK_EXTENSION_FLAG)
+#undef CHECK_EXTENSION_FLAG
+  if (context_.IsEmpty()) {
+    v8::ExtensionConfiguration config(extension_count, extension_names);
+    context_ = v8::Context::New(&config);
+  }
+  context_->Enter();
+}
+
+
 static void PrintTestList(CcTest* current) {
   if (current == NULL) return;
   PrintTestList(current->prev());
   if (current->dependency() != NULL) {
     printf("%s/%s<%s\n",
            current->file(), current->name(), current->dependency());
   } else {
     printf("%s/%s<\n", current->file(), current->name());
   }
 }
 
 
 v8::Isolate* CcTest::default_isolate_;
 
+
 int main(int argc, char* argv[]) {
   v8::internal::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
   CcTest::set_default_isolate(v8::Isolate::GetCurrent());
   CHECK(CcTest::default_isolate() != NULL);
   int tests_run = 0;
   bool print_run_count = true;
   for (int i = 1; i < argc; i++) {
     char* arg = argv[i];
     if (strcmp(arg, "--list") == 0) {
       PrintTestList(CcTest::last());
@@ skipping 37 matching lines @@
     }
   }
   if (print_run_count && tests_run != 1)
     printf("Ran %i tests.\n", tests_run);
   v8::V8::Dispose();
   return 0;
 }
 
 RegisterThreadedTest *RegisterThreadedTest::first_ = NULL;
 int RegisterThreadedTest::count_ = 0;