Revert "Removed default Isolate."

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 134 matching lines @@
   CcTestArrayBufferAllocator array_buffer_allocator;
   v8::V8::SetArrayBufferAllocator(&array_buffer_allocator);
 
   i::PrintExtension print_extension;
   v8::RegisterExtension(&print_extension);
   i::ProfilerExtension profiler_extension;
   v8::RegisterExtension(&profiler_extension);
   i::TraceExtension trace_extension;
   v8::RegisterExtension(&trace_extension);
 
-  v8::V8::Initialize();
   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());
       print_run_count = false;
 
     } else {
       char* arg_copy = v8::internal::StrDup(arg);
@@ skipping 34 matching lines @@
   }
   if (print_run_count && tests_run != 1)
     printf("Ran %i tests.\n", tests_run);
   CcTest::TearDown();
   if (!disable_automatic_dispose_) v8::V8::Dispose();
   return 0;
 }
 
 RegisterThreadedTest *RegisterThreadedTest::first_ = NULL;
 int RegisterThreadedTest::count_ = 0;