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

cc/animation/animation.h

Index: cc/animation/animation.h
diff --git a/cc/animation/animation.h b/cc/animation/animation.h
index 6d1524df64251da93a2caa56b1796114f61edd4a..e8889d81a1d68232488df5dcb61b05fcc69d4277 100644
--- a/cc/animation/animation.h
+++ b/cc/animation/animation.h
@@ -9,7 +9,7 @@
 
 #include "base/macros.h"
 #include "base/time/time.h"
-#include "cc/base/cc_export.h"
+#include "cc/animation/animation_export.h"
 #include "cc/trees/target_property.h"
 
 namespace cc {
@@ -19,7 +19,7 @@ class AnimationCurve;
 // An Animation contains all the state required to play an AnimationCurve.
 // Specifically, the affected property, the run state (paused, finished, etc.),
 // loop count, last pause time, and the total time spent paused.
-class CC_EXPORT Animation {
+class CC_ANIMATION_EXPORT Animation {
  public:
   // Animations begin in the 'WAITING_FOR_TARGET_AVAILABILITY' state. An
   // Animation waiting for target availibility will run as soon as its target