WIP: Eliminate event.target() usage from TrayEventFilter

components/mus/public/cpp/tests/window_tree_client_impl_unittest.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 "components/mus/public/cpp/lib/window_tree_client_impl.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 42 matching lines @@
   TestWindowTreeDelegate() {}
   ~TestWindowTreeDelegate() override {}
 
   ui::Event* last_event_observed() { return last_event_observed_.get(); }
 
   void Reset() { last_event_observed_.reset(); }
 
   // WindowTreeDelegate:
   void OnEmbed(Window* root) override {}
   void OnConnectionLost(WindowTreeConnection* connection) override {}
-  void OnEventObserved(const ui::Event& event) override {
+  void OnEventObserved(const ui::Event& event, Window* target) override {
     last_event_observed_ = ui::Event::Clone(event);
   }
 
  private:
   std::unique_ptr<ui::Event> last_event_observed_;
 
   DISALLOW_COPY_AND_ASSIGN(TestWindowTreeDelegate);
 };
 
 class WindowTreeClientImplPrivate {
@@ skipping 976 matching lines @@
 
   setup.window_tree_client()->OnChangeCompleted(change_id2, false);
   EXPECT_FALSE(child->HasCapture());
   EXPECT_TRUE(root->HasCapture());
 
   setup.window_tree_client()->OnLostCapture(server_id(root));
   EXPECT_FALSE(root->HasCapture());
 }
 
 }  // namespace mus