Merge heap unit tests into src.

test/runtime-unittests/runtime-unittests.h

-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef V8_RUNTIME_UNITTESTS_RUNTIME_UNITTESTS_H_
-#define V8_RUNTIME_UNITTESTS_RUNTIME_UNITTESTS_H_
-
-#include "include/v8.h"
-#include "src/zone.h"
-#include "testing/gtest-support.h"
-
-namespace v8 {
-namespace internal {
-
-// Forward declarations.
-class Factory;
-class Heap;
-
-class RuntimeTest : public ::testing::Test {
- public:
-  RuntimeTest();
-  virtual ~RuntimeTest();
-
-  Factory* factory() const;
-  Heap* heap() const;
-  Isolate* isolate() const { return reinterpret_cast<Isolate*>(isolate_); }
-  Zone* zone() { return &zone_; }
-
-  static void SetUpTestCase();
-  static void TearDownTestCase();
-
- private:
-  static v8::Isolate* isolate_;
-  v8::Isolate::Scope isolate_scope_;
-  v8::HandleScope handle_scope_;
-  Zone zone_;
-};
-
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_RUNTIME_UNITTESTS_RUNTIME_UNITTESTS_H_