Adds ability for pre-target accelerators to not consume events

services/ui/ws/event_dispatcher_delegate.h

 // 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.
 
 #ifndef SERVICES_UI_WS_EVENT_DISPATCHER_DELEGATE_H_
 #define SERVICES_UI_WS_EVENT_DISPATCHER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include "services/ui/common/types.h"
 
 namespace gfx {
 class Point;
 }
 
 namespace ui {
 class Event;
 }
 
 namespace ui {
 namespace ws {
 
 class Accelerator;
 class ServerWindow;
 
 // Used by EventDispatcher for mocking in tests.
 class EventDispatcherDelegate {
  public:
-  virtual void OnAccelerator(uint32_t accelerator, const ui::Event& event) = 0;
+  enum class AcceleratorPhase {
+    PRE,
+    POST,
+  };
+
+  virtual void OnAccelerator(uint32_t accelerator,
+                             const ui::Event& event,
+                             AcceleratorPhase phase) = 0;
 
   virtual void SetFocusedWindowFromEventDispatcher(ServerWindow* window) = 0;
   virtual ServerWindow* GetFocusedWindowForEventDispatcher() = 0;
 
   // Called when capture should be set on the native display. |window| is the
   // window capture is being set on.
   virtual void SetNativeCapture(ServerWindow* window) = 0;
   // Called when the native display is having capture released. There is no
   // longer a ServerWindow holding capture.
   virtual void ReleaseNativeCapture() = 0;
@@ skipping 24 matching lines @@
   virtual void OnEventTargetNotFound(const ui::Event& event) = 0;
 
  protected:
   virtual ~EventDispatcherDelegate() {}
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_EVENT_DISPATCHER_DELEGATE_H_