[Aura] Implement views-based applist.

chrome/browser/ui/views/aura/app_list/extension_item_model.h

Index: chrome/browser/ui/views/aura/app_list/extension_item_model.h
diff --git a/chrome/browser/ui/views/aura/app_list/extension_item_model.h b/chrome/browser/ui/views/aura/app_list/extension_item_model.h
new file mode 100644
index 0000000000000000000000000000000000000000..2845331bca59ff55c28044452fb143cd83435292
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+++ b/chrome/browser/ui/views/aura/app_list/extension_item_model.h
@@ -0,0 +1,51 @@
+// Copyright (c) 2011 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 CHROME_BROWSER_UI_VIEWS_AURA_APP_LIST_EXTENSION_ITEM_MODEL_H_
+#define CHROME_BROWSER_UI_VIEWS_AURA_APP_LIST_EXTENSION_ITEM_MODEL_H_
+#pragma once
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/extensions/image_loading_tracker.h"
+#include "ui/aura_shell/app_list/app_list_item_model.h"
+
+class Extension;
+class ExtensionResource;
+class ExtensionService;
+class SkBitmap;
+
+// ExtensionItemModel represents an extension app in app list.
+class ExtensionItemModel : public aura_shell::AppListItemModel,

[Evan Stade, 2011/12/14 22:59:20]

I don't understand what else there are besides extension apps

[xiyuan, 2011/12/20 00:14:42]

From what I have heard from UX people, app list would also provide things such
as "Go incognito", "Settings" and current opened browser window/tabs besides
extension apps.

[Evan Stade, 2011/12/20 00:21:22]

sounds like it should be called an app list then

[Evan Stade, 2011/12/20 00:26:35]

should not*

+                           public ImageLoadingTracker::Observer {
+ public:
+  ExtensionItemModel(ExtensionService* service,
+                     const Extension* extension);

[sky, 2011/12/14 16:51:33]

I don't know enough about the extension side of things. What is the life time of
an extension? Might it be deleted out from under you?

[Evan Stade, 2011/12/14 22:59:20]

you'll get notified if it gets unloaded

[xiyuan, 2011/12/20 00:14:42]

Changed to only keep extension_id around and check with extension service when
we need an Extension service. 

[xiyuan, 2011/12/20 00:14:42]

Not sure if we will setup notification for app list. Unlike NTP, app list is a
UI like omnibox's popup. We re-build (populate) the model when it is invoked.

[Evan Stade, 2011/12/20 00:21:22]

sure, but you have to be careful because the apps list can still change out from
under you (either due to timing issues, or more likely because of sync).

+
+  const Extension* extension() const {
+    return extension_;
+  }
+
+ private:
+  // Loads extension icon.
+  void LoadImage();
+
+  // Loads default extension icon.
+  void LoadDefaultImage();
+
+  // Overridden from aura_shell::AppListItemModel:
+  virtual void Activate(int event_flags) OVERRIDE;
+
+  // Overridden from ImageLoadingTracker::Observer
+  virtual void OnImageLoaded(SkBitmap* image,
+                             const ExtensionResource& resource,
+                             int tracker_index) OVERRIDE;
+
+  ExtensionService* service_;
+  const Extension* extension_;
+  scoped_ptr<ImageLoadingTracker> tracker_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionItemModel);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_AURA_APP_LIST_EXTENSION_ITEM_MODEL_H_