- 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/menu_runner_win.cc

@@ -0,0 +1,35 @@
+// Copyright (c) 2012 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that can
+// be found in the LICENSE file.
+
+#include "libcef/browser/native/menu_runner_win.h"
+
+#include "libcef/browser/browser_host_impl.h"
+
+#include "base/message_loop/message_loop.h"
+#include "ui/gfx/geometry/point.h"
+#include "ui/views/controls/menu/menu_2.h"
+
+CefMenuRunnerWin::CefMenuRunnerWin() {
+}
+
+bool CefMenuRunnerWin::RunContextMenu(
+    CefBrowserHostImpl* browser,
+    ui::MenuModel* model,
+    const content::ContextMenuParams& params) {
+  // Create a menu based on the model.
+  menu_.reset(new views::NativeMenuWin(model, NULL));
+  menu_->Rebuild(NULL);
+
+  // Make sure events can be pumped while the menu is up.
+  base::MessageLoop::ScopedNestableTaskAllower allow(
+      base::MessageLoop::current());
+
+  const gfx::Point& screen_point =
+      browser->GetScreenPoint(gfx::Point(params.x, params.y));
+
+  // Show the menu. Blocks until the menu is dismissed.
+  menu_->RunMenuAt(screen_point, views::Menu2::ALIGN_TOPLEFT);
+
+  return true;
+}