compositor-worker: Remove code from cc_blink

cc/animation/mutable_properties.h

Index: cc/animation/mutable_properties.h
diff --git a/cc/animation/mutable_properties.h b/cc/animation/mutable_properties.h
index dfe06b69452228506e940112a5217fe879c164a5..daec22566b9808a6e7f63e5a80d9da73be61cd27 100644
--- a/cc/animation/mutable_properties.h
+++ b/cc/animation/mutable_properties.h
@@ -5,14 +5,18 @@
 #ifndef CC_ANIMATION_MUTABLE_PROPERTIES_H_
 #define CC_ANIMATION_MUTABLE_PROPERTIES_H_
 
+#include <stdint.h>
+
 namespace cc {
 
-enum MutableProperty {
-  kMutablePropertyNone = 0,
-  kMutablePropertyOpacity = 1 << 0,
-  kMutablePropertyScrollLeft = 1 << 1,
-  kMutablePropertyScrollTop = 1 << 2,
-  kMutablePropertyTransform = 1 << 3,
+struct MutableProperty {
+  enum : uint32_t { kNone = 0 };
+  enum : uint32_t { kOpacity = 1 << 0 };
+  enum : uint32_t { kScrollLeft = 1 << 1 };
+  enum : uint32_t { kScrollTop = 1 << 2 };
+  enum : uint32_t { kTransform = 1 << 3 };
+
+  enum : int { kNumProperties = 4 };
 };
 
 }  // namespace cc