cros: add SUGGESTED APPS indicator to start page

ui/app_list/views/indicator_chip_view.h

+// Copyright 2017 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_INDICATOR_CHIP_VIEW_H_
+#define UI_APP_LIST_VIEWS_INDICATOR_CHIP_VIEW_H_
+
+#include "base/macros.h"
+#include "ui/views/view.h"
+
+namespace views {
+class Label;
+}  // namespace views
+
+namespace app_list {
+
+// IndicatorChipView consists of a label and is used on top of app tiles for
+// indication purpose.
+class IndicatorChipView : public views::View {
+ public:
+  explicit IndicatorChipView(base::string16 text);

[xiyuan, 2017/06/22 22:33:52]

nit: base::string16 -> const base::string16&

and #include "base/strings/string16.h"

[Qiang(Joe) Xu, 2017/06/22 22:47:27]

Done.

+  ~IndicatorChipView() override;
+
+ private:
+  // views::View overridden:
+  gfx::Size CalculatePreferredSize() const override;
+  void Layout() override;
+
+  views::View* container_ = nullptr;  // Owned by views hierarchy.
+  views::Label* label_ = nullptr;     // Owned by views hierarchy.
+
+  DISALLOW_COPY_AND_ASSIGN(IndicatorChipView);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_VIEWS_INDICATOR_CHIP_VIEW_H_