AdjustBoundsToEnsureMinimumWindowVisibility may cause unwanted shift if window dimension is small

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 <cstring>
 #include <string>
@@ skipping 746 matching lines @@
     // this can be simplified.
     gfx::Rect status_bounds = target_bounds.status_bounds_in_shelf;
     status_bounds.Offset(target_bounds.shelf_bounds_in_root.OffsetFromOrigin());
     // mash::wm::ShelfLayout manages window bounds when running mash.
     if (!Shell::GetInstance()->in_mus()) {
       shelf_widget_->status_area_widget()->SetBounds(
           ScreenUtil::ConvertRectToScreen(
               shelf_widget_->status_area_widget()->GetNativeView()->parent(),
               status_bounds));
     }
-    // For crbug.com/622431, when the shelf alignment is BOTTOM_LOCKED, we
-    // don't set display work area, as it is not real user-set alignment.
     if (!state_.is_screen_locked &&
+        !WmShell::Get()->GetSessionStateDelegate()->IsUserSessionBlocked() &&
         shelf_widget_->GetAlignment() != SHELF_ALIGNMENT_BOTTOM_LOCKED) {
       gfx::Insets insets;
       // If user session is blocked (login to new user session or add user to
       // the existing session - multi-profile) then give 100% of work area only
       // if keyboard is not shown.
       if (!state_.is_adding_user_screen || !keyboard_bounds_.IsEmpty())
         insets = target_bounds.work_area_insets;
       Shell::GetInstance()->SetDisplayWorkAreaInsets(root_window_, insets);
     }
   }
@@ skipping 427 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