Replace IDR window property use with gfx::ImageSkia icons.

ash/mus/window_manager.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 "ash/mus/window_manager.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 302 matching lines @@
 }
 
 bool WindowManager::OnWmSetProperty(
     ui::Window* window,
     const std::string& name,
     std::unique_ptr<std::vector<uint8_t>>* new_data) {
   // TODO(sky): constrain this to set of keys we know about, and allowed values.
   return name == ui::mojom::WindowManager::kShowState_Property ||
          name == ui::mojom::WindowManager::kPreferredSize_Property ||
          name == ui::mojom::WindowManager::kResizeBehavior_Property ||
-         name == ui::mojom::WindowManager::kShelfIconResourceId_Property ||
          name == ui::mojom::WindowManager::kShelfItemType_Property ||
          name == ui::mojom::WindowManager::kWindowAppIcon_Property ||
          name == ui::mojom::WindowManager::kWindowTitle_Property;
 }
 
 ui::Window* WindowManager::OnWmCreateTopLevelWindow(
     std::map<std::string, std::vector<uint8_t>>* properties) {
   return NewTopLevelWindow(properties);
 }
 
@@ skipping 58 matching lines @@
                                                     const ui::Event& event) {
   auto iter = accelerator_handlers_.find(GetAcceleratorNamespaceId(id));
   if (iter == accelerator_handlers_.end())
     return ui::mojom::EventResult::HANDLED;
 
   return iter->second->OnAccelerator(id, event);
 }
 
 }  // namespace mus
 }  // namespace ash