(fix landed) Reland of name MaximizeMode to TabletMode

ash/wm/tablet_mode/tablet_mode_backdrop_delegate_impl.h

Index: ash/wm/tablet_mode/tablet_mode_backdrop_delegate_impl.h
diff --git a/ash/wm/tablet_mode/tablet_mode_backdrop_delegate_impl.h b/ash/wm/tablet_mode/tablet_mode_backdrop_delegate_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..1e70719ceba36d0e849e5862982d650fe6cec003
--- /dev/null
+++ b/ash/wm/tablet_mode/tablet_mode_backdrop_delegate_impl.h
@@ -0,0 +1,32 @@
+// 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.
+
+#ifndef ASH_WM_TABLET_MODE_TABLET_MODE_BACKDROP_DELEGATE_IMPL_H_
+#define ASH_WM_TABLET_MODE_TABLET_MODE_BACKDROP_DELEGATE_IMPL_H_
+
+#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 TabletModeBackdropDelegateImpl : public BackdropDelegate {
+ public:
+  TabletModeBackdropDelegateImpl();
+  ~TabletModeBackdropDelegateImpl() override;
+
+ protected:
+  bool HasBackdrop(aura::Window* window) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TabletModeBackdropDelegateImpl);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_TABLET_MODE_TABLET_MODE_BACKDROP_DELEGATE_IMPL_H_