Make scroll offset type of float in cc

cc/test/animation_test_common.cc

Index: cc/test/animation_test_common.cc
diff --git a/cc/test/animation_test_common.cc b/cc/test/animation_test_common.cc
index 404e161d880494164da9d9a50426c262939422d6..c0f436bb2a0c79428b521074f928c560145dbc71 100644
--- a/cc/test/animation_test_common.cc
+++ b/cc/test/animation_test_common.cc
@@ -220,7 +220,7 @@ void FakeLayerAnimationValueObserver::OnTransformAnimated(
 }
 
 void FakeLayerAnimationValueObserver::OnScrollOffsetAnimated(
-    const gfx::Vector2dF& scroll_offset) {
+    const gfx::ScrollOffset& scroll_offset) {
   scroll_offset_ = scroll_offset;
 }
 
@@ -236,7 +236,7 @@ bool FakeInactiveLayerAnimationValueObserver::IsActive() const {
   return false;
 }
 
-gfx::Vector2dF FakeLayerAnimationValueProvider::ScrollOffsetForAnimation()
+gfx::ScrollOffset FakeLayerAnimationValueProvider::ScrollOffsetForAnimation()
     const {
   return scroll_offset_;
 }