Adds ability for accelerators to add key/value pairs to KeyEvent

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 416 matching lines @@
   handler->AttemptToStartDrag(cursor_location, HTCAPTION, aura_source, on_done);
 }
 
 void WindowManager::OnWmCancelMoveLoop(aura::Window* window) {
   WmWindow* child_window = WmWindow::Get(window);
   MoveEventHandler* handler = MoveEventHandler::GetForWindow(child_window);
   if (handler)
     handler->RevertDrag();
 }
 
-ui::mojom::EventResult WindowManager::OnAccelerator(uint32_t id,
-                                                    const ui::Event& event) {
+ui::mojom::EventResult WindowManager::OnAccelerator(
+    uint32_t id,
+    const ui::Event& event,
+    std::unordered_map<std::string, std::vector<uint8_t>>* properties) {
   auto iter = accelerator_handlers_.find(GetAcceleratorNamespaceId(id));
   if (iter == accelerator_handlers_.end())
     return ui::mojom::EventResult::HANDLED;
 
-  return iter->second->OnAccelerator(id, event);
+  return iter->second->OnAccelerator(id, event, properties);
 }
 
 void WindowManager::OnWmSetClientArea(
     aura::Window* window,
     const gfx::Insets& insets,
     const std::vector<gfx::Rect>& additional_client_areas) {
   NonClientFrameController* non_client_frame_controller =
       NonClientFrameController::Get(window);
   if (!non_client_frame_controller)
     return;
   non_client_frame_controller->SetClientArea(insets, additional_client_areas);
 }
 
 bool WindowManager::IsWindowActive(aura::Window* window) {
   return Shell::GetInstance()->activation_client()->GetActiveWindow() == window;
 }
 
 void WindowManager::OnWmDeactivateWindow(aura::Window* window) {
   Shell::GetInstance()->activation_client()->DeactivateWindow(window);
 }
 
 }  // namespace mus
 }  // namespace ash