capture_mode: Add quick setting feature pod.

Bug: 1113032
Change-Id: Ief8e2a14d2367ad1c8cc65aecd89aa29dcb4d81c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2337634Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Commit-Queue: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795282}

ash/BUILD.gn

@@ -251,6 +251,8 @@ component("ash") {
     "cancel_mode.h",
     "capture_mode/capture_mode_controller.cc",
     "capture_mode/capture_mode_controller.h",
+    "capture_mode/capture_mode_feature_pod_controller.cc",
+    "capture_mode/capture_mode_feature_pod_controller.h",
     "clipboard/clipboard_history.cc",
     "clipboard/clipboard_history.h",
     "clipboard/clipboard_history_controller.cc",

ash/ash_strings.grd

@@ -510,6 +510,10 @@ This file contains the strings for ash.
         Menu moved to the bottom-right corner of the screen.
       </message>
 
+      <message name="IDS_ASH_STATUS_TRAY_CAPTURE_MODE_BUTTON_LABEL" desc="The label text for the button in the status tray to trigger capture mode.">
+        Screen capture
+      </message>
+
       <message name="IDS_ASH_STATUS_TRAY_MIC_GAIN" desc="The accessible text for the toggle mic muted button in the tray audio settings">
         Toggle Mic. <ph name="STATE_TEXT">$1<ex>Mic is muted</ex></ph>
       </message>

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_CAPTURE_MODE_BUTTON_LABEL.png.sha1

+3beac37cfacaecd37ec12886f2719fdb4102cbc2
\ No newline at end of file

ash/capture_mode/capture_mode_feature_pod_controller.cc

+// Copyright 2020 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/capture_mode/capture_mode_feature_pod_controller.h"
+
+#include "ash/capture_mode/capture_mode_controller.h"
+#include "ash/resources/vector_icons/vector_icons.h"
+#include "ash/strings/grit/ash_strings.h"
+#include "ash/system/tray/system_tray_item_uma_type.h"
+#include "ash/system/unified/feature_pod_button.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace ash {
+
+CaptureModeFeaturePodController::CaptureModeFeaturePodController() = default;
+CaptureModeFeaturePodController::~CaptureModeFeaturePodController() = default;
+
+FeaturePodButton* CaptureModeFeaturePodController::CreateButton() {
+  DCHECK(!button_);
+  button_ = new FeaturePodButton(this, /*is_togglable=*/false);
+  button_->SetVectorIcon(kCaptureModeIcon);
+  button_->SetLabel(
+      l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_CAPTURE_MODE_BUTTON_LABEL));
+  return button_;
+}
+
+void CaptureModeFeaturePodController::OnIconPressed() {
+  CaptureModeController::Get()->Start();
+}
+
+SystemTrayItemUmaType CaptureModeFeaturePodController::GetUmaType() const {
+  return SystemTrayItemUmaType::UMA_SCREEN_CAPTURE;
+}
+
+}  // namespace ash

ash/capture_mode/capture_mode_feature_pod_controller.h

+// Copyright 2020 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_CAPTURE_MODE_CAPTURE_MODE_FEATURE_POD_CONTROLLER_H_
+#define ASH_CAPTURE_MODE_CAPTURE_MODE_FEATURE_POD_CONTROLLER_H_
+
+#include "ash/system/unified/feature_pod_controller_base.h"
+#include "base/macros.h"
+
+namespace ash {
+
+// Controller of a feature pod button that toggles night light mode.
+class CaptureModeFeaturePodController : public FeaturePodControllerBase {
+ public:
+  CaptureModeFeaturePodController();
+  CaptureModeFeaturePodController(const CaptureModeFeaturePodController&) =
+      delete;
+  CaptureModeFeaturePodController& operator=(
+      const CaptureModeFeaturePodController&) = delete;
+  ~CaptureModeFeaturePodController() override;
+
+  // FeaturePodControllerBase:
+  FeaturePodButton* CreateButton() override;
+  void OnIconPressed() override;
+  SystemTrayItemUmaType GetUmaType() const override;
+
+ private:
+  FeaturePodButton* button_ = nullptr;
+};
+
+}  // namespace ash
+
+#endif  // ASH_CAPTURE_MODE_CAPTURE_MODE_FEATURE_POD_CONTROLLER_H_

ash/system/unified/unified_system_tray_controller.cc

@@ -4,6 +4,7 @@
 
 #include "ash/system/unified/unified_system_tray_controller.h"
 
+#include "ash/capture_mode/capture_mode_feature_pod_controller.h"
 #include "ash/metrics/user_metrics_action.h"
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/public/cpp/ash_features.h"
@@ -411,6 +412,8 @@ void UnifiedSystemTrayController::InitFeaturePods() {
   AddFeaturePodItem(std::make_unique<VPNFeaturePodController>(this));
   AddFeaturePodItem(std::make_unique<IMEFeaturePodController>(this));
   AddFeaturePodItem(std::make_unique<LocaleFeaturePodController>(this));
+  if (features::IsCaptureModeEnabled())
+    AddFeaturePodItem(std::make_unique<CaptureModeFeaturePodController>());
 
   // If you want to add a new feature pod item, add here.