Removes aura dependencies from WindowPositioner

ash/shelf/shelf_tooltip_manager.cc

Index: ash/shelf/shelf_tooltip_manager.cc
diff --git a/ash/shelf/shelf_tooltip_manager.cc b/ash/shelf/shelf_tooltip_manager.cc
index 7a9b70da02ab697d8163fbd9932c444beefe69f1..e5f521a270d274d8311b6299e489c0cc52abd63f 100644
--- a/ash/shelf/shelf_tooltip_manager.cc
+++ b/ash/shelf/shelf_tooltip_manager.cc
@@ -138,7 +138,8 @@ void ShelfTooltipManager::ShowTooltip(views::View* view) {
   if (bubble_) {
     // Cancel the hiding animation to hide the old bubble immediately.
     gfx::NativeView native_view = bubble_->GetWidget()->GetNativeView();
-    wm::SetWindowVisibilityAnimationTransition(native_view, wm::ANIMATE_NONE);
+    ::wm::SetWindowVisibilityAnimationTransition(native_view,
+                                                 ::wm::ANIMATE_NONE);
     Close();
   }
 
@@ -153,9 +154,9 @@ void ShelfTooltipManager::ShowTooltip(views::View* view) {
   base::string16 text = shelf_view_->GetTitleForView(view);
   bubble_ = new ShelfTooltipBubble(view, arrow, text);
   gfx::NativeView native_view = bubble_->GetWidget()->GetNativeView();
-  wm::SetWindowVisibilityAnimationType(
-      native_view, wm::WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL);
-  wm::SetWindowVisibilityAnimationTransition(native_view, wm::ANIMATE_HIDE);
+  ::wm::SetWindowVisibilityAnimationType(
+      native_view, ::wm::WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL);
+  ::wm::SetWindowVisibilityAnimationTransition(native_view, ::wm::ANIMATE_HIDE);
   bubble_->GetWidget()->Show();
 }