Ignoring alignment when it pushes a window out of the screen

chrome/browser/ui/views/ash/window_positioner.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_ASH_WINDOW_POSITIONER_H_
 #define CHROME_BROWSER_UI_VIEWS_ASH_WINDOW_POSITIONER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "ui/gfx/rect.h"
@@ skipping 13 matching lines @@
   // passed input position is only used to retrieve the width and height.
   // The position is determined on the left / right / top / bottom first. If
   // no smart space is found, the position will follow the standard what other
   // operating systems do (default cascading style).
   gfx::Rect GetPopupPosition(const gfx::Rect& old_pos);
 
  protected:
   // Find a smart way to position the popup window. If there is no space this
   // function will return an empty rectangle.
   gfx::Rect SmartPopupPosition(const gfx::Rect& old_pos,
-                               const gfx::Rect& work_space);
+                               const gfx::Rect& work_area,
+                               int grid);
 
   // Find the next available cascading popup position (on the given screen).
   gfx::Rect NormalPopupPosition(const gfx::Rect& old_pos,
-                                const gfx::Rect& work_space);
+                                const gfx::Rect& work_area);
+
+  // Align the location to the grid / snap to the right / bottom corner.
+  gfx::Rect AlignPopupPosition(const gfx::Rect &pos,
+                               const gfx::Rect &work_area,
+                               int grid);
 
   // Constants to identify the type of resize.
   static const int kBoundsChange_None;
 
   // The offset in X and Y for the next popup which opens.
   int pop_position_offset_increment_x;
   int pop_position_offset_increment_y;
 
   // The position on the screen for the first popup which gets shown if no
   // empty space can be found.
   int popup_position_offset_from_screen_corner_x;
   int popup_position_offset_from_screen_corner_y;
 
   // The last used position.
   int last_popup_position_x_;
   int last_popup_position_y_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowPositioner);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_ASH_WINDOW_POSITIONER_H_