Fixes vertical shelf origin with ChromeVox when shelf is left or right aligned

ash/shelf/shelf_layout_manager.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/shelf/shelf_layout_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <vector>
 
@@ skipping 791 matching lines @@
     // takes care of setting the height properly.
     shelf_size = kShelfAutoHideSize;
   } else if (state.visibility_state == SHELF_HIDDEN ||
              (!keyboard_bounds_.IsEmpty() &&
               !keyboard::IsKeyboardOverscrollEnabled())) {
     shelf_size = 0;
   }
 
   gfx::Rect available_bounds =
       ScreenUtil::GetShelfDisplayBoundsInRoot(root_window_);
+  available_bounds.Inset(0, chromevox_panel_height_, 0, 0);
   int shelf_width = PrimaryAxisValue(available_bounds.width(), shelf_size);
   int shelf_height = PrimaryAxisValue(shelf_size, available_bounds.height());
   int bottom_shelf_vertical_offset = available_bounds.bottom();
   if (keyboard_bounds_.IsEmpty())
     bottom_shelf_vertical_offset -= shelf_height;
   else
     bottom_shelf_vertical_offset -= keyboard_bounds_.height();
 
   gfx::Point shelf_origin = SelectValueForShelfAlignment(
       gfx::Point(available_bounds.x(), bottom_shelf_vertical_offset),
@@ skipping 362 matching lines @@
   if (ash::MaterialDesignController::IsShelfMaterial()) {
     return (state.visibility_state == SHELF_AUTO_HIDE &&
             state.auto_hide_state == SHELF_AUTO_HIDE_SHOWN)
                ? 1.0f
                : 0.0f;
   }
   return (state.visibility_state == SHELF_AUTO_HIDE) ? 1.0f : 0.0f;
 }
 
 }  // namespace ash