Use remembered mouse button state when simulating a mouse move in Ozone.

ui/aura/test/ui_controls_factory_ozone.cc

 // Copyright 2014 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 "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 98 matching lines @@
     gfx::Point host_location = root_location;
     host_->ConvertPointToHost(&host_location);
 
     ui::EventType event_type;
 
     if (button_down_mask_)
       event_type = ui::ET_MOUSE_DRAGGED;
     else
       event_type = ui::ET_MOUSE_MOVED;
 
-    PostMouseEvent(event_type, host_location, 0, 0);
+    PostMouseEvent(event_type, host_location, button_down_mask_, 0);
 
     RunClosureAfterAllPendingUIEvents(closure);
     return true;
   }
   bool SendMouseEvents(ui_controls::MouseButton type, int state) override {
     return SendMouseEventsNotifyWhenDone(type, state, base::Closure());
   }
   bool SendMouseEventsNotifyWhenDone(
       ui_controls::MouseButton type,
       int state,
@@ skipping 107 matching lines @@
 };
 
 }  // namespace
 
 ui_controls::UIControlsAura* CreateUIControlsAura(WindowTreeHost* host) {
   return new UIControlsOzone(host);
 }
 
 }  // namespace test
 }  // namespace aura