This adds in the ability for Chrome to generate windows with snapshots of all...

chrome/browser/chromeos/wm_overview_snapshot.h

+// Copyright (c) 2010 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_CHROMEOS_WM_OVERVIEW_SNAPSHOT_H_
+#define CHROME_BROWSER_CHROMEOS_WM_OVERVIEW_SNAPSHOT_H_
+
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "views/view.h"
+#include "views/widget/widget_gtk.h"
+#include "views/controls/image_view.h"
+
+class Browser;
+
+namespace chromeos {
+
+// A single snapshot displayed by WmOverviewController.
+// WmOverviewSnapshot contains a label, favicon and snapshot.
+class WmOverviewSnapshot : public views::WidgetGtk {
+ public:
+  WmOverviewSnapshot();
+  void Init(const gfx::Size& size, Browser* browser, int index);
+
+  void SetImage(const SkBitmap& image);
+
+  void UpdateIndex(Browser* browser, int index);
+  int index() const { return index_; }
+
+  // Returns the size of the snapshot widget.
+  gfx::Size size() const {
+    gfx::Rect rect;
+    GetBounds(&rect, false);
+    return rect.size();
+  }
+
+  // Has the snapshot been configured? This is true after SetSnapshot
+  // is invoked.
+  bool configured_snapshot() const { return configured_snapshot_; }
+
+  // This resets the configured_snapshot flag for this snapshot so it will
+  // get reloaded the next time we check.
+  void reload_snapshot() { configured_snapshot_ = false; }
+
+ private:
+  // This control is the contents view for this widget.
+  views::ImageView* snapshot_view_;
+
+  // This is the tab index of the snapshot in the associated browser.
+  int index_;
+
+  // This indicates whether or not the snapshot has been configured.
+  bool configured_snapshot_;
+
+  DISALLOW_COPY_AND_ASSIGN(WmOverviewSnapshot);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_WM_OVERVIEW_SNAPSHOT_H_