Add a skeleton Start Page to the experimental app list.

ui/app_list/views/start_page_view.h

+// Copyright 2014 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 UI_APP_LIST_VIEWS_START_PAGE_VIEW_H_
+#define UI_APP_LIST_VIEWS_START_PAGE_VIEW_H_
+
+#include "base/basictypes.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/view.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace views {
+class BoundsAnimator;
+}
+
+namespace app_list {
+
+class AppListMainView;
+
+// A view that contains buttons to switch the displayed view in the given

[tapted, 2014/03/10 02:41:54]

This comment is not right.

[calamity, 2014/03/14 07:50:02]

Done.

+// ContentsView.
+class StartPageView : public views::View,

[tapted, 2014/03/10 02:41:54]

I'd go with SearchPageView (or something other than 'StartPageView' -- since the
start page is something else already.

[calamity, 2014/03/14 07:50:02]

I asked xiyuan@ and he said that the start page webui isn't being developed
anymore, and is a good thing to use for the experimental app list.

I think we can stick with StartPageView and eventually remove the
start_page_view from AppsGridView. Otherwise we'll end up with an equally
confusing start_page_web_contents inside a SearchPageView.

Also, just FYI, the speech contents isn't at all used to display the speech UI,
it's only there to talk to the speech plugin.

[xiyuan, 2014/03/14 17:00:54]

StartPage UI is never finished (my fault) and think launcher 2.0 UI would
replace it.

Getting it out of grid view would be good and made my two bugs obsolete
(http://crbug.com/333911 and http://crbug.com/329561). So ping me when this
happens.

And yes, the speech UI is in views and not part of the start page. The start
page is only a means to host the hotword plugin and provide speech recognition
functionality.

+                      public views::ButtonListener {
+ public:
+  explicit StartPageView(AppListMainView* app_list_main_view,
+                         content::WebContents* start_page_web_contents);
+  virtual ~StartPageView();
+
+ private:
+  // Overridden from views::View:
+  virtual void Layout() OVERRIDE;
+
+  // Overridden from views::ButtonListener:
+  virtual void ButtonPressed(views::Button* sender,
+                             const ui::Event& event) OVERRIDE;
+
+  AppListMainView* app_list_main_view_;  // Owned by views hierarchy.
+  views::View* instant_container_;  // Owned by views hierarchy.
+
+  DISALLOW_COPY_AND_ASSIGN(StartPageView);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_VIEWS_START_PAGE_VIEW_H_