CC: Fix issue for animations with fill and iteration start specified

cc/animation/animation.cc

Index: cc/animation/animation.cc
diff --git a/cc/animation/animation.cc b/cc/animation/animation.cc
index 5fe5b8c030db52b90816ac50639c627842f9b888..5e4bc1e98ac2bae2c7a3adb441c22ed05cb6dfd4 100644
--- a/cc/animation/animation.cc
+++ b/cc/animation/animation.cc
@@ -192,10 +192,11 @@ double Animation::TrimTimeToCurrentIteration(
   DCHECK_GE(iteration_start_, 0);
 
   double active_time = ConvertToActiveTime(monotonic_time);
+  double start_offset = iteration_start_ * curve_->Duration();
 
-  // Return 0 if we are before the start of the animation
+  // Return start offset if we are before the start of the animation
   if (active_time < 0)
-    return 0;
+    return start_offset;
 
   // Always return zero if we have no iterations.
   if (!iterations_)
@@ -207,7 +208,6 @@ double Animation::TrimTimeToCurrentIteration(
 
   double repeated_duration = iterations_ * curve_->Duration();
   double active_duration = repeated_duration / std::abs(playback_rate_);
-  double start_offset = iteration_start_ * curve_->Duration();
 
   // Check if we are past active duration
   if (iterations_ > 0 && active_time >= active_duration)