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

test/cctest/test-symbols.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 
 // Check that we can traverse very deep stacks of ConsStrings using
 // StringCharacterStram.  Check that Get(int) works on very deep stacks
 // of ConsStrings.  These operations may not be very fast, but they
 // should be possible without getting errors due to too deep recursion.
 
 #include "v8.h"
 
 #include "cctest.h"
 #include "objects.h"
 
 using namespace v8::internal;
 
-static v8::Persistent<v8::Context> env;
-
-static void InitializeVM() {
-  if (env.IsEmpty()) {
-    const char* extensions[] = { "v8/print" };
-    v8::ExtensionConfiguration config(1, extensions);
-    env = v8::Context::New(&config);
-  }
-  env->Enter();
-}
-
 
 TEST(Create) {
-  InitializeVM();
+  CcTest::InitializeVM();
   Isolate* isolate = Isolate::Current();
   HandleScope scope(isolate);
 
   const int kNumSymbols = 30;
   Handle<Symbol> symbols[kNumSymbols];
 
   for (int i = 0; i < kNumSymbols; ++i) {
     symbols[i] = isolate->factory()->NewSymbol();
     CHECK(symbols[i]->IsName());
     CHECK(symbols[i]->IsSymbol());
@@ skipping 13 matching lines @@
   HEAP->CollectAllGarbage(Heap::kNoGCFlags);
 
   // All symbols should be distinct.
   for (int i = 0; i < kNumSymbols; ++i) {
     CHECK(symbols[i]->SameValue(*symbols[i]));
     for (int j = i + 1; j < kNumSymbols; ++j) {
       CHECK(!symbols[i]->SameValue(*symbols[j]));
     }
   }
 }