[animations] Adds metrics for jank on selected layer animations

ui/views/animation/flood_fill_ink_drop_ripple.cc

Index: ui/views/animation/flood_fill_ink_drop_ripple.cc
diff --git a/ui/views/animation/flood_fill_ink_drop_ripple.cc b/ui/views/animation/flood_fill_ink_drop_ripple.cc
index 5ed22814c1b497d876ddb939af4ca9d8f588e13c..304eae84c3a707d9b2eae84d4fa7c509de80b86a 100644
--- a/ui/views/animation/flood_fill_ink_drop_ripple.cc
+++ b/ui/views/animation/flood_fill_ink_drop_ripple.cc
@@ -6,7 +6,9 @@
 
 #include <algorithm>
 
+#include "base/lazy_instance.h"
 #include "base/logging.h"
+#include "base/metrics/histogram_macros.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_sequence.h"
@@ -113,6 +115,16 @@ float CalculateCircleLayerRadius(const gfx::Rect& clip_bounds) {
   return std::max(clip_bounds.width(), clip_bounds.height()) / 2.f;
 }
 
+class FloodRippleMetricsReporter : public ui::AnimationMetricsReporter {
+  void Report(int value) override {
+    UMA_HISTOGRAM_PERCENTAGE("Views.AnimationSmoothness.FloodFillRipple",
+                             value);
+  }
+};
+
+base::LazyInstance<FloodRippleMetricsReporter>::Leaky g_reporter =
+    LAZY_INSTANCE_INITIALIZER;
+
 }  // namespace
 
 namespace views {
@@ -323,6 +335,7 @@ void FloodFillInkDropRipple::AnimateToTransform(
   if (animation_observer)
     sequence->AddObserver(animation_observer);
 
+  sequence->SetAnimationMetricsReporter(g_reporter.Pointer());
   animator->StartAnimation(sequence);
 }
 
@@ -344,6 +357,7 @@ void FloodFillInkDropRipple::PauseTransformAnimation(
   if (observer)
     sequence->AddObserver(observer);
 
+  sequence->SetAnimationMetricsReporter(g_reporter.Pointer());
   animator->StartAnimation(sequence);
 }
 
@@ -369,6 +383,7 @@ void FloodFillInkDropRipple::AnimateToOpacity(
   if (animation_observer)
     animation_sequence->AddObserver(animation_observer);
 
+  animation_sequence->SetAnimationMetricsReporter(g_reporter.Pointer());
   animator->StartAnimation(animation_sequence);
 }
 
@@ -390,6 +405,7 @@ void FloodFillInkDropRipple::PauseOpacityAnimation(
   if (observer)
     sequence->AddObserver(observer);
 
+  sequence->SetAnimationMetricsReporter(g_reporter.Pointer());
   animator->StartAnimation(sequence);
 }