[animations] Adds metrics for jank on selected layer animations

ash/wm/overview/scoped_overview_animation_settings_aura.cc

Index: ash/wm/overview/scoped_overview_animation_settings_aura.cc
diff --git a/ash/wm/overview/scoped_overview_animation_settings_aura.cc b/ash/wm/overview/scoped_overview_animation_settings_aura.cc
index d785c185dfe0f306f3abed9ed5c2c737a11a0cd6..9d5b117ab1821a299ce9d1633187a912ba8bbf81 100644
--- a/ash/wm/overview/scoped_overview_animation_settings_aura.cc
+++ b/ash/wm/overview/scoped_overview_animation_settings_aura.cc
@@ -4,8 +4,10 @@
 
 #include "ash/wm/overview/scoped_overview_animation_settings_aura.h"
 
+#include "base/lazy_instance.h"
 #include "base/time/time.h"
 #include "ui/aura/window.h"
+#include "ui/compositor/animation_metrics_reporter_template.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
@@ -51,6 +53,39 @@ base::TimeDelta GetAnimationDuration(OverviewAnimationType animation_type) {
   return base::TimeDelta();
 }
 
+extern constexpr char kMetricCloseName[] =
+    "Ash.WindowSelector.AnimationSmoothness.Close";
+extern constexpr char kMetricEnterName[] =
+    "Ash.WindowSelector.AnimationSmoothness.Enter";
+extern constexpr char kMetricExitName[] =
+    "Ash.WindowSelector.AnimationSmoothness.Exit";
+
+base::LazyInstance<ui::AnimationMetricsReporterTemplate<kMetricCloseName>>::
+    Leaky g_reporter_close = LAZY_INSTANCE_INITIALIZER;
+base::LazyInstance<ui::AnimationMetricsReporterTemplate<kMetricEnterName>>::
+    Leaky g_reporter_enter = LAZY_INSTANCE_INITIALIZER;
+base::LazyInstance<ui::AnimationMetricsReporterTemplate<kMetricExitName>>::Leaky
+    g_reporter_exit = LAZY_INSTANCE_INITIALIZER;
+
+ui::AnimationMetricsReporter* GetMetricsReporter(
+    OverviewAnimationType animation_type) {
+  switch (animation_type) {
+    case OVERVIEW_ANIMATION_NONE:
+      return nullptr;
+    case OVERVIEW_ANIMATION_ENTER_OVERVIEW_MODE_FADE_IN:
+    case OVERVIEW_ANIMATION_LAY_OUT_SELECTOR_ITEMS:
+      return g_reporter_enter.Pointer();
+    case OVERVIEW_ANIMATION_EXIT_OVERVIEW_MODE_FADE_OUT:
+    case OVERVIEW_ANIMATION_RESTORE_WINDOW:
+      return g_reporter_exit.Pointer();
+    case OVERVIEW_ANIMATION_CLOSING_SELECTOR_ITEM:
+    case OVERVIEW_ANIMATION_CLOSE_SELECTOR_ITEM:
+      return g_reporter_close.Pointer();
+  }
+  NOTREACHED();
+  return nullptr;
+}
+
 }  // namespace
 
 ScopedOverviewAnimationSettingsAura::ScopedOverviewAnimationSettingsAura(
@@ -91,6 +126,8 @@ ScopedOverviewAnimationSettingsAura::ScopedOverviewAnimationSettingsAura(
   }
   animation_settings_->SetTransitionDuration(
       GetAnimationDuration(animation_type));
+  animation_settings_->SetAnimationMetricsReporter(
+      GetMetricsReporter(animation_type));
 }
 
 ScopedOverviewAnimationSettingsAura::~ScopedOverviewAnimationSettingsAura() {}