refactor: rename the atom directory to shell

shell/browser/api/trackable_object.cc

@@ -0,0 +1,66 @@
+// Copyright (c) 2015 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/browser/api/trackable_object.h"
+
+#include <memory>
+
+#include "atom/browser/atom_browser_main_parts.h"
+#include "base/bind.h"
+#include "base/supports_user_data.h"
+
+namespace mate {
+
+namespace {
+
+const char* kTrackedObjectKey = "TrackedObjectKey";
+
+class IDUserData : public base::SupportsUserData::Data {
+ public:
+  explicit IDUserData(int32_t id) : id_(id) {}
+
+  operator int32_t() const { return id_; }
+
+ private:
+  int32_t id_;
+
+  DISALLOW_COPY_AND_ASSIGN(IDUserData);
+};
+
+}  // namespace
+
+TrackableObjectBase::TrackableObjectBase() : weak_factory_(this) {
+  atom::AtomBrowserMainParts::Get()->RegisterDestructionCallback(
+      GetDestroyClosure());
+}
+
+TrackableObjectBase::~TrackableObjectBase() {}
+
+base::OnceClosure TrackableObjectBase::GetDestroyClosure() {
+  return base::BindOnce(&TrackableObjectBase::Destroy,
+                        weak_factory_.GetWeakPtr());
+}
+
+void TrackableObjectBase::Destroy() {
+  delete this;
+}
+
+void TrackableObjectBase::AttachAsUserData(base::SupportsUserData* wrapped) {
+  wrapped->SetUserData(kTrackedObjectKey,
+                       std::make_unique<IDUserData>(weak_map_id_));
+}
+
+// static
+int32_t TrackableObjectBase::GetIDFromWrappedClass(
+    base::SupportsUserData* wrapped) {
+  if (wrapped) {
+    auto* id =
+        static_cast<IDUserData*>(wrapped->GetUserData(kTrackedObjectKey));
+    if (id)
+      return *id;
+  }
+  return 0;
+}
+
+}  // namespace mate