aura: Remove event-dispatch methods from WindowTreeHostDelegate interface.

ui/aura/window_targeter_unittest.cc

 // Copyright (c) 2013 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/window_targeter.h"
 
 #include "ui/aura/scoped_window_targeter.h"
 #include "ui/aura/test/aura_test_base.h"
 #include "ui/aura/test/test_event_handler.h"
 #include "ui/aura/test/test_window_delegate.h"
@@ skipping 42 matching lines @@
   root_window()->Show();
 
   test::TestEventHandler handler;
   one->AddPreTargetHandler(&handler);
 
   ui::MouseEvent press(ui::ET_MOUSE_PRESSED,
                        gfx::Point(20, 20),
                        gfx::Point(20, 20),
                        ui::EF_NONE,
                        ui::EF_NONE);
-  root_window()->GetDispatcher()->AsWindowTreeHostDelegate()->
-      OnHostMouseEvent(&press);
+  DispatchEventUsingWindowDispatcher(&press);
   EXPECT_EQ(1, handler.num_mouse_events());
 
   handler.Reset();
-  ui::EventDispatchDetails details =
-      root_window()->GetDispatcher()->OnEventFromSource(&press);
-  EXPECT_FALSE(details.dispatcher_destroyed);
+  DispatchEventUsingWindowDispatcher(&press);
   EXPECT_EQ(1, handler.num_mouse_events());
 
   one->RemovePreTargetHandler(&handler);
 }
 
 TEST_F(WindowTargeterTest, ScopedWindowTargeter) {
   test::TestWindowDelegate delegate;
   scoped_ptr<Window> window(CreateNormalWindow(1, root_window(), &delegate));
   Window* child = CreateNormalWindow(2, window.get(), &delegate);
 
@@ skipping 22 matching lines @@
   }
   scoped_targeter.reset();
   {
     ui::MouseEvent mouse(ui::ET_MOUSE_MOVED, event_location, event_location,
                          ui::EF_NONE, ui::EF_NONE);
     EXPECT_EQ(child, targeter->FindTargetForEvent(root, &mouse));
   }
 }
 
 }  // namespace aura