Adds additional_client_area to client area

ui/aura/mus/window_tree_host_mus.cc

 // Copyright 2015 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/window_tree_host_mus.h"
 
 #include "base/memory/ptr_util.h"
 #include "ui/aura/env.h"
 #include "ui/aura/mus/input_method_mus.h"
 #include "ui/aura/mus/window_port_mus.h"
@@ skipping 90 matching lines @@
 WindowTreeHostMus::~WindowTreeHostMus() {
   DestroyCompositor();
   DestroyDispatcher();
 }
 
 void WindowTreeHostMus::SetBoundsFromServer(const gfx::Rect& bounds) {
   base::AutoReset<bool> resetter(&in_set_bounds_from_server_, true);
   SetBoundsInPixels(bounds);
 }
 
-void WindowTreeHostMus::SetClientArea(const gfx::Insets& insets) {
+void WindowTreeHostMus::SetClientArea(
+    const gfx::Insets& insets,
+    const std::vector<gfx::Rect>& additional_client_area) {
   delegate_->OnWindowTreeHostClientAreaWillChange(this, insets,
-                                                  std::vector<gfx::Rect>());
+                                                  additional_client_area);
 }
 
 void WindowTreeHostMus::SetHitTestMask(const base::Optional<gfx::Rect>& rect) {
   delegate_->OnWindowTreeHostHitTestMaskWillChange(this, rect);
 }
 
 display::Display WindowTreeHostMus::GetDisplay() const {
   for (const display::Display& display :
        display::Screen::GetScreen()->GetAllDisplays()) {
     if (display.id() == display_id_)
@@ skipping 32 matching lines @@
 void WindowTreeHostMus::OnCloseRequest() {
   OnHostCloseRequested();
 }
 
 gfx::ICCProfile WindowTreeHostMus::GetICCProfileForCurrentDisplay() {
   // TODO: This should read the profile from mus. crbug.com/647510
   return gfx::ICCProfile();
 }
 
 }  // namespace aura