Add a simple browser UI (with url bar)

mandoline/ui/browser/desktop/desktop_ui.h

Index: mandoline/ui/browser/desktop/desktop_ui.h
diff --git a/mandoline/ui/browser/desktop/desktop_ui.h b/mandoline/ui/browser/desktop/desktop_ui.h
new file mode 100644
index 0000000000000000000000000000000000000000..c3167b0d1bc37a83b974d25c20104c4257615ed3
--- /dev/null
+++ b/mandoline/ui/browser/desktop/desktop_ui.h
@@ -0,0 +1,53 @@
+// Copyright 2015 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 MANDOLINE_UI_BROWSER_DESKTOP_DESKTOP_UI_H_
+#define MANDOLINE_UI_BROWSER_DESKTOP_DESKTOP_UI_H_
+
+#include "mandoline/ui/aura/aura_init.h"
+#include "mandoline/ui/browser/browser_ui.h"
+#include "ui/views/controls/textfield/textfield_controller.h"
+#include "ui/views/layout/layout_manager.h"
+
+namespace mojo {
+class Shell;
+class View;
+}
+
+namespace mandoline {
+
+class Browser;
+
+class DesktopUI : public BrowserUI,
+                  public views::LayoutManager,
+                  public views::TextfieldController {
+ public:
+  DesktopUI(Browser* browser, mojo::Shell* shell);
+  ~DesktopUI() override;
+
+ private:
+  // Overridden from BrowserUI
+  void Init(mojo::View* root, mojo::View* content) override;
+
+  // Overridden from views::LayoutManager:
+  gfx::Size GetPreferredSize(const views::View* view) const override;
+  void Layout(views::View* host) override;
+
+  // Overridden from views::TextfieldController:
+  bool HandleKeyEvent(views::Textfield* sender,
+                      const ui::KeyEvent& key_event) override;
+
+  AuraInit aura_init_;
+  Browser* browser_;
+  mojo::Shell* shell_;
+  views::Textfield* omnibox_;
+  mojo::View* root_;
+  mojo::View* content_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopUI);
+};
+
+}  // namespace mandoline
+
+#endif  // MANDOLINE_UI_BROWSER_DESKTOP_DESKTOP_UI_H_