CrOS Shelf: Rename AppListButton --> HomeButton

This change was created mostly with the help of sed and mv :-)

Bug: 973443
Change-Id: Id7c15d67e7be3ec20859fa26f43ad88145a16b96
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1679163
Commit-Queue: Manu Cornet <manucornet@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672795}

diff --git a/ash/shelf/home_button.h b/ash/shelf/home_button.h
new file mode 100644
index 0000000..76abc80
--- /dev/null
+++ b/ash/shelf/home_button.h

@@ -0,0 +1,68 @@
+// 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 ASH_SHELF_HOME_BUTTON_H_
+#define ASH_SHELF_HOME_BUTTON_H_
+
+#include <memory>
+
+#include "ash/app_list/app_list_metrics.h"
+#include "ash/ash_export.h"
+#include "ash/shelf/home_button_controller.h"
+#include "ash/shelf/shelf_control_button.h"
+#include "base/macros.h"
+#include "ui/views/view_targeter_delegate.h"
+
+namespace ash {
+
+class Shelf;
+class ShelfView;
+
+// Button used for the AppList icon on the shelf. It opens the app list (in
+// clamshell mode) or home screen (in tablet mode). Because the clamshell-mode
+// app list appears like a dismissable overlay, the button is highlighted while
+// the app list is open in clamshell mode.
+//
+// If Assistant is enabled, the button is filled in; long-pressing it will
+// launch Assistant.
+class ASH_EXPORT HomeButton : public ShelfControlButton,
+                              public views::ViewTargeterDelegate {
+ public:
+  static const char kViewClassName[];
+
+  HomeButton(ShelfView* shelf_view, Shelf* shelf);
+  ~HomeButton() override;
+
+  // views::Button:
+  void OnGestureEvent(ui::GestureEvent* event) override;
+  const char* GetClassName() const override;
+
+  // Called when the availability of a long-press gesture may have changed, e.g.
+  // when Assistant becomes enabled.
+  void OnVoiceInteractionAvailabilityChanged();
+
+  // True if the app list is shown for the display containing this button.
+  bool IsShowingAppList() const;
+
+  virtual void OnPressed(app_list::AppListShowSource show_source,
+                         base::TimeTicks time_stamp);
+
+ protected:
+  // views::Button:
+  void PaintButtonContents(gfx::Canvas* canvas) override;
+
+ private:
+  // views::ViewTargeterDelegate:
+  bool DoesIntersectRect(const views::View* target,
+                         const gfx::Rect& rect) const override;
+
+  // The controller used to determine the button's behavior.
+  HomeButtonController controller_;
+
+  DISALLOW_COPY_AND_ASSIGN(HomeButton);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SHELF_HOME_BUTTON_H_