CC Animation: Make cc/animation an independent GN component.

cc/animation/element_animations.h

Index: cc/animation/element_animations.h
diff --git a/cc/animation/element_animations.h b/cc/animation/element_animations.h
index 87ae783a69b798875bb77407c7cd5faab1f9968a..dc4ff9c33fc6fe7be982978c082fb63248f82b90 100644
--- a/cc/animation/element_animations.h
+++ b/cc/animation/element_animations.h
@@ -12,7 +12,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
-#include "cc/base/cc_export.h"
+#include "cc/animation/animation_export.h"
 #include "cc/trees/element_id.h"
 #include "cc/trees/property_animation_state.h"
 #include "cc/trees/target_property.h"
@@ -37,7 +37,8 @@ struct AnimationEvent;
 // the element.
 // This is a CC counterpart for blink::ElementAnimations (in 1:1 relationship).
 // No pointer to/from respective blink::ElementAnimations object for now.
-class CC_EXPORT ElementAnimations : public base::RefCounted<ElementAnimations> {
+class CC_ANIMATION_EXPORT ElementAnimations
+    : public base::RefCounted<ElementAnimations> {
  public:
   static scoped_refptr<ElementAnimations> Create();