- Factor platform-specific code out of CefBrowserHostImpl (issue #1749).

- Introduce native/ and osr/ folders for native (non-platform-agnostic) and
    osr (windowless) code respectively.
  - Introduce CefBrowserPlatformDelegate for abstracting platform-specific
    implementations of browser host functionality.
  - Move dialog and menu code to separate manager and platform-specific runner
    implementations exposed via CefBrowserPlatformDelegate.
  - Standardize focus-handling behavior between windowed and windowless
    implementations. CefFocusHandler::OnSetFocus() will now also be called for
    osr focus changes.
- Support multiple simultaneous popups (issue #1289).

libcef/browser/native/javascript_dialog_runner_mac.h

@@ -0,0 +1,49 @@
+// Copyright (c) 2012 The Chromium Embedded Framework Authors.
+// Portions copyright (c) 2012 The Chromium 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 CEF_LIBCEF_BROWSER_NATIVE_JAVASCRIPT_DIALOG_RUNNER_MAC_H_
+#define CEF_LIBCEF_BROWSER_NATIVE_JAVASCRIPT_DIALOG_RUNNER_MAC_H_
+#pragma once
+
+#include "libcef/browser/javascript_dialog_runner.h"
+
+#include "base/mac/scoped_nsobject.h"
+#include "base/memory/weak_ptr.h"
+
+#if __OBJC__
+@class CefJavaScriptDialogHelper;
+#else
+class CefJavaScriptDialogHelper;
+#endif  // __OBJC__
+
+class CefJavaScriptDialogRunnerMac : public CefJavaScriptDialogRunner {
+ public:
+  CefJavaScriptDialogRunnerMac();
+  ~CefJavaScriptDialogRunnerMac() override;
+
+  // CefJavaScriptDialogRunner methods:
+  void Run(
+      CefBrowserHostImpl* browser,
+      content::JavaScriptMessageType message_type,
+      const base::string16& display_url,
+      const base::string16& message_text,
+      const base::string16& default_prompt_text,
+      const DialogClosedCallback& callback) override;
+  void Cancel() override;
+
+  // Callback from CefJavaScriptDialogHelper when the dialog is closed.
+  void DialogClosed(bool success,
+                    const base::string16& user_input);
+
+ private:
+  DialogClosedCallback callback_;
+
+  base::scoped_nsobject<CefJavaScriptDialogHelper> helper_;
+
+  // Must be the last member.
+  base::WeakPtrFactory<CefJavaScriptDialogRunnerMac> weak_ptr_factory_;
+};
+
+#endif  // CEF_LIBCEF_BROWSER_NATIVE_JAVASCRIPT_DIALOG_RUNNER_MAC_H_