Remove docked windows entirely in M59.

ui/aura/mus/property_converter.cc

 // Copyright 2016 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 "ui/aura/mus/property_converter.h"
 
 #include "base/memory/ptr_util.h"
 #include "mojo/public/cpp/bindings/type_converter.h"
 #include "services/ui/public/cpp/property_type_converters.h"
 #include "services/ui/public/interfaces/window_manager.mojom.h"
@@ skipping 28 matching lines @@
                    ui::mojom::kResizeBehaviorCanMinimize |
                    ui::mojom::kResizeBehaviorCanResize);
 }
 
 bool ValidateShowState(int64_t value) {
   return value == int64_t(ui::mojom::ShowState::DEFAULT) ||
          value == int64_t(ui::mojom::ShowState::NORMAL) ||
          value == int64_t(ui::mojom::ShowState::MINIMIZED) ||
          value == int64_t(ui::mojom::ShowState::MAXIMIZED) ||
          value == int64_t(ui::mojom::ShowState::INACTIVE) ||
-         value == int64_t(ui::mojom::ShowState::FULLSCREEN) ||
-         value == int64_t(ui::mojom::ShowState::DOCKED);
+         value == int64_t(ui::mojom::ShowState::FULLSCREEN);
 }
 
 }  // namespace
 
 PropertyConverter::PrimitiveProperty::PrimitiveProperty() {}
 
 PropertyConverter::PrimitiveProperty::PrimitiveProperty(
     const PrimitiveProperty& property) = default;
 
 PropertyConverter::PrimitiveProperty::~PrimitiveProperty() {}
@@ skipping 259 matching lines @@
 }
 
 void PropertyConverter::RegisterProperty(
     const WindowProperty<base::string16*>* property,
     const char* transport_name) {
   string16_properties_[property] = transport_name;
   transport_names_.insert(transport_name);
 }
 
 }  // namespace aura