refactor: rename the atom directory to shell

shell/browser/javascript_environment.h

@@ -0,0 +1,69 @@
+// Copyright (c) 2013 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_JAVASCRIPT_ENVIRONMENT_H_
+#define ATOM_BROWSER_JAVASCRIPT_ENVIRONMENT_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "gin/public/isolate_holder.h"
+#include "uv.h"  // NOLINT(build/include)
+
+namespace node {
+class Environment;
+class MultiIsolatePlatform;
+}  // namespace node
+
+namespace atom {
+
+class MicrotasksRunner;
+// Manage the V8 isolate and context automatically.
+class JavascriptEnvironment {
+ public:
+  explicit JavascriptEnvironment(uv_loop_t* event_loop);
+  ~JavascriptEnvironment();
+
+  void OnMessageLoopCreated();
+  void OnMessageLoopDestroying();
+
+  node::MultiIsolatePlatform* platform() const { return platform_; }
+  v8::Isolate* isolate() const { return isolate_; }
+  v8::Local<v8::Context> context() const {
+    return v8::Local<v8::Context>::New(isolate_, context_);
+  }
+
+ private:
+  v8::Isolate* Initialize(uv_loop_t* event_loop);
+  // Leaked on exit.
+  node::MultiIsolatePlatform* platform_;
+
+  v8::Isolate* isolate_;
+  gin::IsolateHolder isolate_holder_;
+  v8::Isolate::Scope isolate_scope_;
+  v8::Locker locker_;
+  v8::HandleScope handle_scope_;
+  v8::Global<v8::Context> context_;
+  v8::Context::Scope context_scope_;
+
+  std::unique_ptr<MicrotasksRunner> microtasks_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(JavascriptEnvironment);
+};
+
+// Manage the Node Environment automatically.
+class NodeEnvironment {
+ public:
+  explicit NodeEnvironment(node::Environment* env);
+  ~NodeEnvironment();
+
+ private:
+  node::Environment* env_;
+
+  DISALLOW_COPY_AND_ASSIGN(NodeEnvironment);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_JAVASCRIPT_ENVIRONMENT_H_