Check target value

ui/compositor/layer_animator.cc

Index: ui/compositor/layer_animator.cc
diff --git a/ui/compositor/layer_animator.cc b/ui/compositor/layer_animator.cc
index 2a47bd9ace30403e58be4667cf269eda134b1edd..763a3cb5c886a1d8e9b1c1cef71b8f63ee1d2fd0 100644
--- a/ui/compositor/layer_animator.cc
+++ b/ui/compositor/layer_animator.cc
@@ -23,6 +23,7 @@
 #include "ui/compositor/layer_animation_sequence.h"
 #include "ui/compositor/layer_animator_collection.h"
 
+#include "base/debug/stack_trace.h"
 #define SAFE_INVOKE_VOID(function, running_anim, ...) \
     if (running_anim.is_sequence_alive()) \
       function(running_anim.sequence(), ##__VA_ARGS__)
@@ -79,6 +80,26 @@ LayerAnimator* LayerAnimator::CreateImplicitAnimator() {
       base::TimeDelta::FromMilliseconds(kDefaultTransitionDurationMs));
 }
 
+void Print(const std::string& name, const gfx::Rect& r) {
+  LOG(ERROR) << name << ":" << r.ToString();
+}
+
+void Print(const std::string& name, const gfx::Transform& t) {
+  LOG(ERROR) << name << ":" << t.ToString();
+}
+
+void Print(const std::string& name, float f) {
+  LOG(ERROR) << name << ":" << f;
+}
+
+void Print(const std::string& name, int i) {
+  LOG(ERROR) << name << ":" << i;
+}
+
+void Print(const std::string& name, SkColor c) {
+  LOG(ERROR) << name << ":" << c;
+}
+
 // This macro provides the implementation for the setter and getter (well,
 // the getter of the target value) for an animated property. For example,
 // it is used for the implementations of SetTransform and GetTargetTransform.
@@ -91,7 +112,7 @@ LayerAnimator* LayerAnimator::CreateImplicitAnimator() {
     if (duration.is_zero() && delegate() &&                             \
         (preemption_strategy_ != ENQUEUE_NEW_ANIMATION)) {              \
       StopAnimatingProperty(LayerAnimationElement::property);           \
-      delegate()->Set##name##FromAnimation(value);                      \
+      delegate()->Set##name##FromAnimation(value);                    \
       return;                                                           \
     }                                                                   \
     std::unique_ptr<LayerAnimationElement> element(                     \