Allow the user to cancel the capture region action, and show its active status in the tray.

ash/common/system/chromeos/palette/tools/capture_region_action.cc

-// Copyright 2016 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.
-
-#include "ash/common/system/chromeos/palette/tools/capture_region_action.h"
-
-#include "ash/common/accelerators/accelerator_controller.h"
-#include "ash/common/palette_delegate.h"
-#include "ash/common/system/chromeos/palette/palette_ids.h"
-#include "ash/common/system/toast/toast_data.h"
-#include "ash/common/system/toast/toast_manager.h"
-#include "ash/common/wm_shell.h"
-#include "grit/ash_strings.h"
-#include "ui/base/l10n/l10n_util.h"
-
-namespace ash {
-
-namespace {
-
-const char kToastId[] = "palette_capture_region";
-const int kToastDurationMs = 2500;
-
-}  // namespace
-
-CaptureRegionAction::CaptureRegionAction(Delegate* delegate)
-    : CommonPaletteTool(delegate) {}
-
-CaptureRegionAction::~CaptureRegionAction() {}
-
-PaletteGroup CaptureRegionAction::GetGroup() const {
-  return PaletteGroup::ACTION;
-}
-
-PaletteToolId CaptureRegionAction::GetToolId() const {
-  return PaletteToolId::CAPTURE_REGION;
-}
-
-void CaptureRegionAction::OnEnable() {
-  CommonPaletteTool::OnEnable();
-
-  ToastData toast(kToastId, l10n_util::GetStringUTF16(
-                                IDS_ASH_STYLUS_TOOLS_CAPTURE_REGION_TOAST),
-                  kToastDurationMs, base::string16());
-  ash::WmShell::Get()->toast_manager()->Show(toast);
-
-  WmShell::Get()->palette_delegate()->TakePartialScreenshot();
-  delegate()->DisableTool(GetToolId());
-  delegate()->HidePalette();
-}
-
-views::View* CaptureRegionAction::CreateView() {
-  return CreateDefaultView(
-      l10n_util::GetStringUTF16(IDS_ASH_STYLUS_TOOLS_CAPTURE_REGION_ACTION));
-}
-
-gfx::VectorIconId CaptureRegionAction::GetPaletteIconId() {
-  return gfx::VectorIconId::PALETTE_ACTION_CAPTURE_REGION;
-}
-
-}  // namespace ash