CC Animation: Fix pauseAnimation so it doesn't reset blink negative delays

cc/test/animation_test_common.h

Index: cc/test/animation_test_common.h
diff --git a/cc/test/animation_test_common.h b/cc/test/animation_test_common.h
index 5d0d4b5dacfa61e4465190a772c0a330f48060fb..42512fc2d48b204b372c722007019f91f23333bc 100644
--- a/cc/test/animation_test_common.h
+++ b/cc/test/animation_test_common.h
@@ -196,6 +196,12 @@ int AddAnimatedFilterToPlayer(AnimationPlayer* player,
                               float start_brightness,
                               float end_brightness);
 
+int AddOpacityStepsToController(LayerAnimationController* target,
+                                double duration,
+                                float start_opacity,
+                                float end_opacity,
+                                int num_steps);
+
 }  // namespace cc
 
 #endif  // CC_TEST_ANIMATION_TEST_COMMON_H_