[Aura] Support additonal event filters in DesktopEventFilter.

ui/aura/test/test_event_filter.cc

Index: ui/aura/test/test_event_filter.cc
diff --git a/ui/aura/test/test_event_filter.cc b/ui/aura/test/test_event_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..de9968919d79cf5fbb4261f52e2bdebe69b4b1e7
--- /dev/null
+++ b/ui/aura/test/test_event_filter.cc
@@ -0,0 +1,47 @@
+// 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.
+
+#include "ui/aura/test/test_event_filter.h"
+
+namespace aura {
+namespace test {
+
+TestEventFilter::TestEventFilter(Window* owner)
+    : EventFilter(owner),
+      key_event_count_(0),
+      mouse_event_count_(0),
+      touch_event_count_(0),
+      consumes_key_events_(false),
+      consumes_mouse_events_(false),
+      consumes_touch_events_(false) {
+}
+
+TestEventFilter::~TestEventFilter() {
+}
+
+void TestEventFilter::ResetCounts() {
+  key_event_count_ = 0;
+  mouse_event_count_ = 0;
+  touch_event_count_ = 0;
+}
+
+bool TestEventFilter::PreHandleKeyEvent(Window* target, KeyEvent* event) {
+  ++key_event_count_;
+  return consumes_key_events_;
+}
+
+bool TestEventFilter::PreHandleMouseEvent(Window* target, MouseEvent* event) {
+  ++mouse_event_count_;
+  return consumes_mouse_events_;
+}
+
+ui::TouchStatus TestEventFilter::PreHandleTouchEvent(Window* target,
+                                                     TouchEvent* event) {
+  ++touch_event_count_;
+  // TODO(sadrul): !
+  return ui::TOUCH_STATUS_UNKNOWN;
+}
+
+}  // namespace test
+}  // namespace aura