Adds additional_client_area to client area

ui/views/mus/desktop_window_tree_host_mus.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_MUS_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_MUS_H_
 
 #include <memory>
 #include <set>
 
@@ skipping 19 matching lines @@
  public:
   DesktopWindowTreeHostMus(
       internal::NativeWidgetDelegate* native_widget_delegate,
       DesktopNativeWidgetAura* desktop_native_widget_aura,
       const std::map<std::string, std::vector<uint8_t>>* mus_properties);
   ~DesktopWindowTreeHostMus() override;
 
   // Called when the window was deleted on the server.
   void ServerDestroyedWindow() { CloseNow(); }
 
+  // Controls whether the client area is automatically updated as necessary.
+  void set_auto_update_client_area(bool value) {
+    auto_update_client_area_ = value;
+  }
+
  private:
   bool IsDocked() const;
 
   void SendClientAreaToServer();
   void SendHitTestMaskToServer();
 
   // Helper function to get the scale factor.
   float GetScaleFactor() const;
 
   void SetBoundsInDIP(const gfx::Rect& bounds_in_dip);
 
+  // Returns true if the client area should be set on this.
+  bool ShouldSendClientAreaToServer() const;
+
   // DesktopWindowTreeHost:
   void Init(aura::Window* content_window,
             const Widget::InitParams& params) override;
   void OnNativeWidgetCreated(const Widget::InitParams& params) override;
   void OnWidgetInitDone() override;
   std::unique_ptr<corewm::Tooltip> CreateTooltip() override;
   std::unique_ptr<aura::client::DragDropClient> CreateDragDropClient(
       DesktopNativeCursorManager* cursor_manager) override;
   void Close() override;
   void CloseNow() override;
@@ skipping 74 matching lines @@
 
   // We can optionally have a parent which can order us to close, or own
   // children who we're responsible for closing when we CloseNow().
   DesktopWindowTreeHostMus* parent_ = nullptr;
   std::set<DesktopWindowTreeHostMus*> children_;
 
   bool is_active_ = false;
 
   std::unique_ptr<wm::CursorManager> cursor_manager_;
 
+  bool auto_update_client_area_ = true;
+
   // Used so that Close() isn't immediate.
   base::WeakPtrFactory<DesktopWindowTreeHostMus> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostMus);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_MUS_H_