Removes aura dependencies from WindowPositioner

ash/magnifier/magnification_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/magnifier/magnification_controller.h"
 
 #include <memory>
 #include <utility>
 
 #include "ash/accelerators/accelerator_controller.h"
@@ skipping 799 matching lines @@
   // Note: OnCaretBoundsChanged could be fired OnTextInputTypeChanged during
   // which the caret position is not set a meaning position, and we do not
   // need to adjust the view port position based on the bogus caret position.
   // This is only a transition period, the caret position will be fixed upon
   // focusing right after.
   if (caret_bounds.width() == 0 && caret_bounds.height() == 0)
     return;
 
   caret_point_ = caret_bounds.CenterPoint();
   // |caret_point_| in |root_window_| coordinates.
-  wm::ConvertPointFromScreen(root_window_, &caret_point_);
+  ::wm::ConvertPointFromScreen(root_window_, &caret_point_);
 
   // If the feature for centering the text input focus is disabled, the
   // magnifier window will be moved to follow the focus with a panning margin.
   if (!KeepFocusCentered()) {
     // Visible window_rect in |root_window_| coordinates.
     const gfx::Rect visible_window_rect = GetViewportRect();
     const int panning_margin = kCaretPanningMargin / scale_;
     MoveMagnifierWindowFollowPoint(caret_point_,
                                    panning_margin,
                                    panning_margin,
@@ skipping 23 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // MagnificationController:
 
 // static
 MagnificationController* MagnificationController::CreateInstance() {
   return new MagnificationControllerImpl();
 }
 
 }  // namespace ash