add stylus metrics

ash/shell.cc

 // Copyright (c) 2012 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/shell.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 110 matching lines @@
 #include "ash/display/display_color_manager_chromeos.h"
 #include "ash/display/display_error_observer_chromeos.h"
 #include "ash/display/projecting_observer_chromeos.h"
 #include "ash/display/resolution_notification_controller.h"
 #include "ash/display/screen_orientation_controller_chromeos.h"
 #include "ash/sticky_keys/sticky_keys_controller.h"
 #include "ash/system/chromeos/power/power_event_observer.h"
 #include "ash/system/chromeos/power/video_activity_notifier.h"
 #include "ash/touch/touch_transformer_controller.h"
 #include "ash/virtual_keyboard_controller.h"
+#include "ash/wm/stylus_metrics_recorder.h"
 #include "base/bind_helpers.h"
 #include "base/sys_info.h"
 #include "chromeos/audio/audio_a11y_controller.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "ui/chromeos/user_activity_power_manager_notifier.h"
 #include "ui/display/chromeos/display_configurator.h"
 
 #if defined(USE_X11)
 #include "ui/display/chromeos/x11/native_display_delegate_x11.h"
 #endif
@@ skipping 404 matching lines @@
   RemovePreTargetHandler(speech_feedback_handler_.get());
   speech_feedback_handler_.reset();
 #endif
   RemovePreTargetHandler(overlay_filter_.get());
   RemovePreTargetHandler(accelerator_filter_.get());
   RemovePreTargetHandler(event_transformation_handler_.get());
   RemovePreTargetHandler(toplevel_window_event_handler_.get());
   RemovePostTargetHandler(toplevel_window_event_handler_.get());
   RemovePreTargetHandler(system_gesture_filter_.get());
   RemovePreTargetHandler(mouse_cursor_filter_.get());
+#if defined(OS_CHROMEOS)
+  RemovePreTargetHandler(stylus_metrics_recorder_.get());
+#endif
   RemovePreTargetHandler(modality_filter_.get());
 
   // TooltipController is deleted with the Shell so removing its references.
   RemovePreTargetHandler(tooltip_controller_.get());
 
 #if defined(OS_CHROMEOS)
   screen_orientation_controller_.reset();
 #endif
 
 // Destroy the virtual keyboard controller before the maximize mode controller
@@ skipping 71 matching lines @@
   desktop_background_controller_.reset();
   screenshot_controller_.reset();
   mouse_cursor_filter_.reset();
   modality_filter_.reset();
 
 #if defined(OS_CHROMEOS)
   touch_transformer_controller_.reset();
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_CHROMEOS)
+  stylus_metrics_recorder_.reset();
+#endif  // defined(OS_CHROMEOS)

[oshima, 2016/08/23 21:40:57]

Please put then in the single OS_CHROMEOS. (It probably because of some
refactoring)

[xiaoyinh(OOO Sep 11-29), 2016/08/23 22:43:01]

I have grouped the neighbors into single OS_CHROMEOS. Thanks!

+
+#if defined(OS_CHROMEOS)
   audio_a11y_controller_.reset();
 #endif  // defined(OS_CHROMEOS)
 
   // This also deletes all RootWindows. Note that we invoke Shutdown() on
   // WindowTreeHostManager before resetting |window_tree_host_manager_|, since
   // destruction
   // of its owned RootWindowControllers relies on the value.
   display_manager_->CreateScreenForShutdown();
   display_configuration_controller_.reset();
 
@@ skipping 201 matching lines @@
 
   drag_drop_controller_.reset(new DragDropController);
   // |screenshot_controller_| needs to be created (and prepended as a
   // pre-target handler) at this point, because |mouse_cursor_filter_| needs to
   // process mouse events prior to screenshot session.
   // See http://crbug.com/459214
   screenshot_controller_.reset(new ScreenshotController());
   mouse_cursor_filter_.reset(new MouseCursorEventFilter());
   PrependPreTargetHandler(mouse_cursor_filter_.get());
 
+#if defined(OS_CHROMEOS)
+  // |stylus_metrics_recorder| records stylus metrics for certain events.
+  // It does not handle/consume any events, so prepend it as a pre-target hander
+  // before events are consumed elsewhere.
+  stylus_metrics_recorder_.reset(new StylusMetricsRecorder());
+  PrependPreTargetHandler(stylus_metrics_recorder_.get());
+#endif
+
   // Create Controllers that may need root window.
   // TODO(oshima): Move as many controllers before creating
   // RootWindowController as possible.
   visibility_controller_.reset(new AshVisibilityController);
 
   magnification_controller_.reset(MagnificationController::CreateInstance());
   wm_shell_->CreateMruWindowTracker();
 
   partial_magnification_controller_.reset(new PartialMagnificationController());
 
@@ skipping 153 matching lines @@
 std::unique_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
   return std::unique_ptr<ui::EventTargetIterator>();
 }
 
 ui::EventTargeter* Shell::GetEventTargeter() {
   NOTREACHED();
   return nullptr;
 }
 
 }  // namespace ash