mash: Add WmShell::SetDisplayWorkAreaInsets for ShelfLayoutManager.

ash/wm/drag_window_resizer_unittest.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/wm/drag_window_resizer.h"
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/window_positioning_utils.h"
@@ skipping 60 matching lines @@
 
   void SetUp() override {
     AshMDTestBase::SetUp();
 
     UpdateDisplay(base::StringPrintf("800x%d", kRootHeight));
 
     aura::Window* root = Shell::GetPrimaryRootWindow();
     gfx::Rect root_bounds(root->bounds());
     EXPECT_EQ(kRootHeight, root_bounds.height());
     EXPECT_EQ(800, root_bounds.width());
-    Shell::GetInstance()->SetDisplayWorkAreaInsets(root, gfx::Insets());
     window_.reset(new aura::Window(&delegate_));
     window_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
     window_->Init(ui::LAYER_NOT_DRAWN);
     ParentWindowInPrimaryRootWindow(window_.get());
     window_->set_id(1);
 
     always_on_top_window_.reset(new aura::Window(&delegate2_));
     always_on_top_window_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
     always_on_top_window_->SetProperty(aura::client::kAlwaysOnTopKey, true);
     always_on_top_window_->Init(ui::LAYER_NOT_DRAWN);
@@ skipping 689 matching lines @@
     ASSERT_TRUE(resizer.get());
     resizer->Drag(CalculateDragPoint(*resizer, 399, 200), 0);
     EXPECT_TRUE(TestIfMouseWarpsAt(gfx::Point(399, 200)));
     EXPECT_EQ("401,200",
               aura::Env::GetInstance()->last_mouse_location().ToString());
     resizer->CompleteDrag();
   }
 }
 
 }  // namespace ash