first step to remove unsafe handles

test/cctest/test-alloc.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 77 matching lines @@
   return Smi::FromInt(42);
 }
 
 
 static Handle<Object> Test() {
   CALL_HEAP_FUNCTION(ISOLATE, AllocateAfterFailures(), Object);
 }
 
 
 TEST(StressHandles) {
-  v8::Persistent<v8::Context> env = v8::Context::New();
-  v8::HandleScope scope(env->GetIsolate());
+  v8::HandleScope scope(v8::Isolate::GetCurrent());
+  v8::Handle<v8::Context> env = v8::Context::New(v8::Isolate::GetCurrent());
   env->Enter();
   Handle<Object> o = Test();
   CHECK(o->IsSmi() && Smi::cast(*o)->value() == 42);
   env->Exit();
 }
 
 
 static MaybeObject* TestAccessorGet(Object* object, void*) {
   return AllocateAfterFailures();
 }
 
 
 const AccessorDescriptor kDescriptor = {
   TestAccessorGet,
   0,
   0
 };
 
 
 TEST(StressJS) {
-  v8::Persistent<v8::Context> env = v8::Context::New();
-  v8::HandleScope scope(env->GetIsolate());
+  v8::HandleScope scope(v8::Isolate::GetCurrent());
+  v8::Handle<v8::Context> env = v8::Context::New(v8::Isolate::GetCurrent());
   env->Enter();
   Handle<JSFunction> function =
       FACTORY->NewFunction(FACTORY->function_string(), FACTORY->null_value());
   // Force the creation of an initial map and set the code to
   // something empty.
   FACTORY->NewJSObject(function);
   function->ReplaceCode(Isolate::Current()->builtins()->builtin(
       Builtins::kEmptyFunction));
   // Patch the map to have an accessor for "get".
   Handle<Map> map(function->initial_map());
@@ skipping 88 matching lines @@
         blocks[index] = blocks.RemoveLast();
       } else {
         blocks.RemoveLast();
       }
     }
   }
 
   code_range->TearDown();
   delete code_range;
 }