Revert "Replace AnimationMetricsReporter in ShelfView"

This reverts commit 197fd0a5.

Reason for revert:
Crash in OnFadeOutAnimationEnded when it runs with no | fade_out_animation_tracker_| instance.

Original change's description:
> Replace AnimationMetricsReporter in ShelfView
>
> ui::AnimationMetricsReporter is deprecating. Replace it with
> ui::AnimationThroughputReporter for simple layer animations and
> ui::ThroughputTracker for complicated ones.
>
> Bug: 11434673
> Change-Id: I96425e7626929f9d6381828c81dbe08dd58168e9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2508793
> Reviewed-by: Andrew Xu <andrewxu@chromium.org>
> Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#822425}

TBR=xiyuan@chromium.org,andrewxu@chromium.org

Change-Id: Ib675aac6a9a57a7603529827069fd316ae7166be
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 11434673
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2508958Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822499}

ash/shelf/shelf_view.cc

@@ -15,7 +15,6 @@
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/public/cpp/ash_constants.h"
 #include "ash/public/cpp/ash_features.h"
-#include "ash/public/cpp/metrics_util.h"
 #include "ash/public/cpp/shelf_model.h"
 #include "ash/public/cpp/shelf_types.h"
 #include "ash/public/cpp/window_properties.h"
@@ -63,7 +62,6 @@
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/base/ui_base_features.h"
 #include "ui/compositor/animation_metrics_reporter.h"
-#include "ui/compositor/animation_throughput_reporter.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/layer_animator.h"
@@ -115,6 +113,12 @@ constexpr char kShelfIconFadeInAnimationHistogram[] =
 constexpr char kShelfIconFadeOutAnimationHistogram[] =
     "Ash.ShelfIcon.AnimationSmoothness.FadeOut";
 
+enum class IconAnimationType {
+  kMoveAnimation,
+  kFadeInAnimation,
+  kFadeOutAnimation
+};
+
 // Helper to check if tablet mode is enabled.
 bool IsTabletModeEnabled() {
   return Shell::Get()->tablet_mode_controller() &&
@@ -193,20 +197,34 @@ class ShelfFocusSearch : public views::FocusSearch {
   DISALLOW_COPY_AND_ASSIGN(ShelfFocusSearch);
 };
 
-void ReportMoveAnimationSmoothness(int smoothness) {
-  base::UmaHistogramPercentageObsoleteDoNotUse(kShelfIconMoveAnimationHistogram,
-                                               smoothness);
-}
+class IconAnimationMetricsReporter : public ui::AnimationMetricsReporter {
+ public:
+  explicit IconAnimationMetricsReporter(IconAnimationType type) : type_(type) {}
+  IconAnimationMetricsReporter(const IconAnimationMetricsReporter&) = delete;
+  IconAnimationMetricsReporter& operator=(const IconAnimationMetricsReporter&) =
+      delete;
+  ~IconAnimationMetricsReporter() override = default;
 
-void ReportFadeInAnimationSmoothness(int smoothness) {
+ private:
+  void Report(int value) override {
+    switch (type_) {
+      case IconAnimationType::kMoveAnimation:
         base::UmaHistogramPercentageObsoleteDoNotUse(
-      kShelfIconFadeInAnimationHistogram, smoothness);
-}
-
-void ReportFadeOutAnimationSmoothness(int smoothness) {
+            kShelfIconMoveAnimationHistogram, value);
+        break;
+      case IconAnimationType::kFadeInAnimation:
         base::UmaHistogramPercentageObsoleteDoNotUse(
-      kShelfIconFadeOutAnimationHistogram, smoothness);
-}
+            kShelfIconFadeInAnimationHistogram, value);
+        break;
+      case IconAnimationType::kFadeOutAnimation:
+        base::UmaHistogramPercentageObsoleteDoNotUse(
+            kShelfIconFadeOutAnimationHistogram, value);
+        break;
+    }
+  }
+
+  IconAnimationType type_ = IconAnimationType::kMoveAnimation;
+};
 
 // Returns the id of the display on which |view| is shown.
 int64_t GetDisplayIdForView(const View* view) {
@@ -372,6 +390,13 @@ int ShelfView::GetSizeOfAppButtons(int count, int button_size) {
 }
 
 void ShelfView::Init() {
+  move_animation_reporter_ = std::make_unique<IconAnimationMetricsReporter>(
+      IconAnimationType::kMoveAnimation);
+  fade_in_animation_reporter_ = std::make_unique<IconAnimationMetricsReporter>(
+      IconAnimationType::kFadeInAnimation);
+  fade_out_animation_reporter_ = std::make_unique<IconAnimationMetricsReporter>(
+      IconAnimationType::kFadeOutAnimation);
+
   separator_ = new views::Separator();
   separator_->SetColor(AshColorProvider::Get()->GetContentLayerColor(
       AshColorProvider::ContentLayerType::kSeparatorColor));
@@ -1356,11 +1381,7 @@ void ShelfView::OnTabletModeChanged() {
 
 void ShelfView::AnimateToIdealBounds() {
   CalculateIdealBounds();
-
-  move_animation_tracker_.emplace(
-      GetWidget()->GetCompositor()->RequestNewThroughputTracker());
-  move_animation_tracker_->Start(metrics_util::ForSmoothness(
-      base::BindRepeating(&ReportMoveAnimationSmoothness)));
+  bounds_animator_->SetAnimationMetricsReporter(move_animation_reporter_.get());
 
   for (int i = 0; i < view_model_->view_size(); ++i) {
     View* view = view_model_->view_at(i);
@@ -1383,12 +1404,8 @@ void ShelfView::FadeIn(views::View* view) {
   fade_in_animation_settings.SetPreemptionStrategy(
       ui::LayerAnimator::IMMEDIATELY_SET_NEW_TARGET);
   fade_in_animation_settings.AddObserver(fade_in_animation_delegate_.get());
-
-  ui::AnimationThroughputReporter reporter(
-      fade_in_animation_settings.GetAnimator(),
-      metrics_util::ForSmoothness(
-          base::BindRepeating(&ReportFadeInAnimationSmoothness)));
-
+  fade_in_animation_settings.SetAnimationMetricsReporter(
+      fade_in_animation_reporter_.get());
   view->layer()->SetOpacity(1.f);
 }
 
@@ -1791,9 +1808,6 @@ void ShelfView::OnFadeInAnimationEnded() {
 }
 
 void ShelfView::OnFadeOutAnimationEnded() {
-  fade_out_animation_tracker_->Stop();
-  fade_out_animation_tracker_.reset();
-
   // Call PreferredSizeChanged() to notify container to re-layout at the end
   // of removal animation.
   PreferredSizeChanged();
@@ -2009,13 +2023,10 @@ void ShelfView::ShelfItemRemoved(int model_index, const ShelfItem& old_item) {
   if (view->GetVisible() && view->layer()->opacity() > 0.0f) {
     UpdateShelfItemViewsVisibility();
 
-    fade_out_animation_tracker_.emplace(
-        GetWidget()->GetCompositor()->RequestNewThroughputTracker());
-    fade_out_animation_tracker_->Start(metrics_util::ForSmoothness(
-        base::BindRepeating(&ReportFadeOutAnimationSmoothness)));
-
     // The first animation fades out the view. When done we'll animate the rest
     // of the views to their target location.
+    bounds_animator_->SetAnimationMetricsReporter(
+        fade_out_animation_reporter_.get());
     bounds_animator_->AnimateViewTo(view.get(), view->bounds());
     bounds_animator_->SetAnimationDelegate(
         view.get(), std::unique_ptr<gfx::AnimationDelegate>(
@@ -2328,11 +2339,6 @@ void ShelfView::OnBoundsAnimatorProgressed(views::BoundsAnimator* animator) {
 void ShelfView::OnBoundsAnimatorDone(views::BoundsAnimator* animator) {
   shelf_->set_is_tablet_mode_animation_running(false);
 
-  if (move_animation_tracker_) {
-    move_animation_tracker_->Stop();
-    move_animation_tracker_.reset();
-  }
-
   if (snap_back_from_rip_off_view_ && animator == bounds_animator_.get()) {
     if (!animator->IsAnimating(snap_back_from_rip_off_view_)) {
       // Coming here the animation of the ShelfAppButton is finished and the

ash/shelf/shelf_view.h

@@ -24,10 +24,8 @@
 #include "ash/shell_observer.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/optional.h"
 #include "base/timer/timer.h"
 #include "third_party/skia/include/core/SkColor.h"
-#include "ui/compositor/throughput_tracker.h"
 #include "ui/views/accessibility/view_accessibility.h"
 #include "ui/views/accessible_pane_view.h"
 #include "ui/views/animation/bounds_animator_observer.h"
@@ -696,11 +694,14 @@ class ASH_EXPORT ShelfView : public views::AccessiblePaneView,
 
   std::unique_ptr<FadeInAnimationDelegate> fade_in_animation_delegate_;
 
-  // Tracks the icon move animation.
-  base::Optional<ui::ThroughputTracker> move_animation_tracker_;
+  // The animation metrics reporter for icon move animation.
+  std::unique_ptr<ui::AnimationMetricsReporter> move_animation_reporter_;
 
-  // Tracks the icon fade-out animation.
-  base::Optional<ui::ThroughputTracker> fade_out_animation_tracker_;
+  // The animation metrics reporter for icon fade-in animation.
+  std::unique_ptr<ui::AnimationMetricsReporter> fade_in_animation_reporter_;
+
+  // The animation metrics reporter for icon fade-out animation.
+  std::unique_ptr<ui::AnimationMetricsReporter> fade_out_animation_reporter_;
 
   // Called when showing shelf context menu.
   base::RepeatingClosure context_menu_shown_callback_;