Implement position: sticky updates on compositor

ui/gfx/transform.cc

Index: ui/gfx/transform.cc
diff --git a/ui/gfx/transform.cc b/ui/gfx/transform.cc
index 88f0942a974f8067df245e8a6c2b1fb7cd803391..6a44391c02760477e2eeddb75b4da9e3c59980d1 100644
--- a/ui/gfx/transform.cc
+++ b/ui/gfx/transform.cc
@@ -175,10 +175,18 @@ void Transform::Scale3d(SkMScalar x, SkMScalar y, SkMScalar z) {
   matrix_.preScale(x, y, z);
 }
 
+void Transform::Translate(const Vector2dF& offset) {
+  Translate(offset.x(), offset.y());
+}
+
 void Transform::Translate(SkMScalar x, SkMScalar y) {
   matrix_.preTranslate(x, y, 0);
 }
 
+void Transform::Translate3d(const Vector3dF& offset) {
+  Translate3d(offset.x(), offset.y(), offset.z());
+}
+
 void Transform::Translate3d(SkMScalar x, SkMScalar y, SkMScalar z) {
   matrix_.preTranslate(x, y, z);
 }