mash: Preliminary support for shelf auto-hide

ash/shelf/shelf_layout_manager_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/shelf/shelf_layout_manager.h"
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/ash_switches.h"
 #include "ash/display/display_manager.h"
@@ skipping 224 matching lines @@
  public:
   ShelfLayoutObserverTest()
       : changed_auto_hide_state_(false) {
   }
 
   ~ShelfLayoutObserverTest() override {}
 
   bool changed_auto_hide_state() const { return changed_auto_hide_state_; }
 
  private:
-  void OnAutoHideStateChanged(ShelfAutoHideState new_state) override {
+  // ShelfLayoutManagerObserver:
+  void OnAutoHideStateChanged(ShelfLayoutManager* layout_manager,
+                              ShelfAutoHideState new_state) override {
     changed_auto_hide_state_ = true;
   }
 
   bool changed_auto_hide_state_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfLayoutObserverTest);
 };
 
 // Trivial item implementation that tracks its views for testing.
 class TestItem : public SystemTrayItem {
@@ skipping 2037 matching lines @@
   StatusAreaWidget* status_area_widget =
       Shell::GetPrimaryRootWindowController()->shelf()->status_area_widget();
   EXPECT_TRUE(status_area_widget->IsVisible());
   // Shelf should be in the first display's area.
   gfx::Rect status_area_bounds(status_area_widget->GetWindowBoundsInScreen());
   EXPECT_TRUE(gfx::Rect(0, 0, 500, 400).Contains(status_area_bounds));
   EXPECT_EQ(gfx::Point(500, 400), status_area_bounds.bottom_right());
 }
 
 }  // namespace ash