mac: Provide ViewsDelegate

atom/browser/ui/cocoa/views_delegate_mac.h

@@ -0,0 +1,30 @@
+// Copyright (c) 2018 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_UI_COCOA_VIEWS_DELEGATE_MAC_H_
+#define ATOM_BROWSER_UI_COCOA_VIEWS_DELEGATE_MAC_H_
+
+#include "ui/views/views_delegate.h"
+
+namespace atom {
+
+class ViewsDelegateMac : public views::ViewsDelegate {
+ public:
+  ViewsDelegateMac();
+  ~ViewsDelegateMac() override;
+
+  // ViewsDelegate:
+  void OnBeforeWidgetInit(
+      views::Widget::InitParams* params,
+      views::internal::NativeWidgetDelegate* delegate) override;
+  ui::ContextFactory* GetContextFactory() override;
+  ui::ContextFactoryPrivate* GetContextFactoryPrivate() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ViewsDelegateMac);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_UI_COCOA_VIEWS_DELEGATE_MAC_H_

atom/browser/ui/cocoa/views_delegate_mac.mm

@@ -0,0 +1,33 @@
+// Copyright (c) 2018 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/browser/ui/cocoa/views_delegate_mac.h"
+
+#include "content/public/browser/context_factory.h"
+#include "ui/views/widget/native_widget_mac.h"
+
+namespace atom {
+
+ViewsDelegateMac::ViewsDelegateMac() {
+}
+
+ViewsDelegateMac::~ViewsDelegateMac() {
+}
+
+void ViewsDelegateMac::OnBeforeWidgetInit(
+    views::Widget::InitParams* params,
+    views::internal::NativeWidgetDelegate* delegate) {
+  if (!params->native_widget)
+    params->native_widget = new views::NativeWidgetMac(delegate);
+}
+
+ui::ContextFactory* ViewsDelegateMac::GetContextFactory() {
+  return content::GetContextFactory();
+}
+
+ui::ContextFactoryPrivate* ViewsDelegateMac::GetContextFactoryPrivate() {
+  return content::GetContextFactoryPrivate();
+}
+
+}  // namespace atom