Revert 263043 "Remove obsolete scale related APIs for cursor"

trunk/src/ash/test/cursor_manager_test_api.cc

Index: trunk/src/ash/test/cursor_manager_test_api.cc
===================================================================
--- trunk/src/ash/test/cursor_manager_test_api.cc	(revision 263047)
+++ trunk/src/ash/test/cursor_manager_test_api.cc	(working copy)
@@ -23,6 +23,10 @@
 }
 
 // TODO(tdanderson): CursorManagerTestApi may no longer be needed.
+float CursorManagerTestApi::GetCurrentScale() const {
+  return cursor_manager_->GetScale();
+}
+
 ui::CursorSetType CursorManagerTestApi::GetCurrentCursorSet() const {
   return cursor_manager_->GetCursorSet();
 }