Cleanup duplicated namespace in AnimationTranslationUtil

Source/core/animation/AnimationTranslationUtil.h

Index: Source/core/animation/AnimationTranslationUtil.h
diff --git a/Source/core/animation/AnimationTranslationUtil.h b/Source/core/animation/AnimationTranslationUtil.h
index f547671e18a8d184fd8a108d4e88ea51c8fd813b..3935630bb5b18ea997aac14dc610d5ecb6c0e0f0 100644
--- a/Source/core/animation/AnimationTranslationUtil.h
+++ b/Source/core/animation/AnimationTranslationUtil.h
@@ -32,17 +32,14 @@
 #define AnimationTranslationUtil_h
 
 namespace blink {
-class WebTransformOperations;
-class WebFilterOperations;
-}
-
-namespace blink {
 
 class FilterOperations;
 class TransformOperations;
+class WebFilterOperations;
+class WebTransformOperations;
 
-void toWebTransformOperations(const TransformOperations& inOperations, blink::WebTransformOperations* outOperations);
-void toWebFilterOperations(const FilterOperations& inOperations, blink::WebFilterOperations* outOperations);
+void toWebTransformOperations(const TransformOperations& inOperations, WebTransformOperations* outOperations);
+void toWebFilterOperations(const FilterOperations& inOperations, WebFilterOperations* outOperations);
 
 } // namespace blink