(fix landed) Reland of name MaximizeMode to TabletMode

ash/wm/maximize_mode/maximize_mode_backdrop_delegate_impl.h

Index: ash/wm/maximize_mode/maximize_mode_backdrop_delegate_impl.h
diff --git a/ash/wm/maximize_mode/maximize_mode_backdrop_delegate_impl.h b/ash/wm/maximize_mode/maximize_mode_backdrop_delegate_impl.h
deleted file mode 100644
index 010b9ecff6a30b0f3fdab925b90946f662aff350..0000000000000000000000000000000000000000
--- a/ash/wm/maximize_mode/maximize_mode_backdrop_delegate_impl.h
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2017 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/workspace/backdrop_delegate.h"
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-
-namespace ash {
-
-// A backdrop delegate for MaximizedMode, which always creates a backdrop.
-// This is also used in the WorkspaceLayoutManagerBackdropTest, hence
-// is public.
-class ASH_EXPORT MaximizeModeBackdropDelegateImpl : public BackdropDelegate {
- public:
-  MaximizeModeBackdropDelegateImpl();
-  ~MaximizeModeBackdropDelegateImpl() override;
-
- protected:
-  bool HasBackdrop(aura::Window* window) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MaximizeModeBackdropDelegateImpl);
-};
-
-}  // namespace ash