WIP: Eliminate event.target() usage from TrayEventFilter

ui/views/mus/window_manager_connection_unittest.cc

 // Copyright 2016 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/views/mus/window_manager_connection.h"
 
 #include <memory>
 
 #include "base/message_loop/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/event.h"
 #include "ui/views/pointer_watcher.h"
 #include "ui/views/test/scoped_views_test_helper.h"
 
 namespace views {
 namespace {
 
 class TestPointerWatcher : public PointerWatcher {
  public:
   TestPointerWatcher() {}
   ~TestPointerWatcher() override {}
 
   ui::Event* last_event() { return last_event_.get(); }
 
   void Reset() { last_event_.reset(); }
 
   // PointerWatcher:
   void OnMousePressed(const ui::MouseEvent& event,
-                      const gfx::Point& location_in_screen) override {
+                      const gfx::Point& location_in_screen,
+                      Widget* target) override {
     last_event_ = ui::Event::Clone(event);
   }
   void OnTouchPressed(const ui::TouchEvent& event,
-                      const gfx::Point& location_in_screen) override {
+                      const gfx::Point& location_in_screen,
+                      Widget* target) override {
     last_event_ = ui::Event::Clone(event);
   }
 
  private:
   std::unique_ptr<ui::Event> last_event_;
 
   DISALLOW_COPY_AND_ASSIGN(TestPointerWatcher);
 };
 
 }  // namespace
 
 class WindowManagerConnectionTest : public testing::Test {
  public:
   WindowManagerConnectionTest() {}
   ~WindowManagerConnectionTest() override {}
 
   void OnEventObserved(const ui::Event& event) {
-    WindowManagerConnection::Get()->OnEventObserved(event);
+    WindowManagerConnection::Get()->OnEventObserved(event, nullptr);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WindowManagerConnectionTest);
 };
 
 TEST_F(WindowManagerConnectionTest, PointerWatcher) {
   base::MessageLoop message_loop(base::MessageLoop::TYPE_UI);
   ScopedViewsTestHelper helper;
   WindowManagerConnection* connection = WindowManagerConnection::Get();
@@ skipping 39 matching lines @@
   watcher2.Reset();
 
   // Removing the last PointerWatcher stops sending events to it.
   connection->RemovePointerWatcher(&watcher2);
   OnEventObserved(mouse_pressed);
   EXPECT_FALSE(watcher1.last_event());
   EXPECT_FALSE(watcher2.last_event());
 }
 
 }  // namespace views