[Aura] Support additonal event filters in DesktopEventFilter.

ui/aura/test/test_event_filter.h

Index: ui/aura/test/test_event_filter.h
diff --git a/ui/aura/test/test_event_filter.h b/ui/aura/test/test_event_filter.h
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index 0000000000000000000000000000000000000000..95298262f433a12ba4f66edf65466cfb69abd18a
--- /dev/null
+++ b/ui/aura/test/test_event_filter.h
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+// Copyright (c) 2011 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_AURA_TEST_TEST_EVENT_FILTER_H_
+#define UI_AURA_TEST_TEST_EVENT_FILTER_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "ui/aura/event_filter.h"
+
+namespace aura {
+
+class Window;
+
+namespace test {
+
+// TestEventFilter counts the key, mouse and touch events it receives and can
+// optinally be set to consume those events.
+class TestEventFilter : public EventFilter {
+ public:
+  explicit TestEventFilter(Window* owner);
+  virtual ~TestEventFilter();
+
+  // Resets all event counters.
+  void ResetCounts();
+
+  int key_event_count() const { return key_event_count_; }
+  int mouse_event_count() const { return mouse_event_count_; }
+  int touch_event_count() const { return touch_event_count_; }
+
+  void set_consumes_key_events(bool consumes_key_events) {
+    consumes_key_events_ = consumes_key_events;
+  }
+  void set_consumes_mouse_events(bool consumes_mouse_events) {
+    consumes_mouse_events_ = consumes_mouse_events;
+  }
+  void set_consumes_touch_events(bool consumes_touch_events) {
+    consumes_touch_events_ = consumes_touch_events;
+  }
+
+  // Overridden from EventFilter:
+  virtual bool PreHandleKeyEvent(Window* target, KeyEvent* event) OVERRIDE;
+  virtual bool PreHandleMouseEvent(Window* target, MouseEvent* event) OVERRIDE;
+  virtual ui::TouchStatus PreHandleTouchEvent(Window* target,
+                                              TouchEvent* event) OVERRIDE;
+
+ private:
+  int key_event_count_;
+  int mouse_event_count_;
+  int touch_event_count_;
+
+  bool consumes_key_events_;
+  bool consumes_mouse_events_;
+  bool consumes_touch_events_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestEventFilter);
+};
+
+}  // namespace test
+}  // namespace aura
+
+#endif  // UI_AURA_TEST_TEST_EVENT_FILTER_H_