Do not interchange MOUSE_MOVED and MOUSE_DRAGGED events in Widget

ui/views/widget/root_view.cc

 // Copyright (c) 2012 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/widget/root_view.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 411 matching lines @@
   // it must be marked as handled to avoid anything happening from default
   // processing if it the first click-part was handled by us.
   if (last_click_handler_ && (event.flags() & ui::EF_IS_DOUBLE_CLICK))
     hit_disabled_view = true;
 
   last_click_handler_ = NULL;
   return hit_disabled_view;
 }
 
 bool RootView::OnMouseDragged(const ui::MouseEvent& event) {
+  CHECK_EQ(ui::ET_MOUSE_DRAGGED, event.type());
   if (mouse_pressed_handler_) {
     SetMouseLocationAndFlags(event);
 
     ui::MouseEvent mouse_event(event, static_cast<View*>(this),
                                mouse_pressed_handler_);
     ui::EventDispatchDetails dispatch_details =
         DispatchEvent(mouse_pressed_handler_, &mouse_event);
     if (dispatch_details.dispatcher_destroyed)
       return false;
   }
@@ skipping 37 matching lines @@
     SetMouseHandler(NULL);
     if (mouse_pressed_handler)
       mouse_pressed_handler->OnMouseCaptureLost();
     else
       gesture_handler->OnMouseCaptureLost();
     // WARNING: we may have been deleted.
   }
 }
 
 void RootView::OnMouseMoved(const ui::MouseEvent& event) {
+  CHECK_EQ(ui::ET_MOUSE_MOVED, event.type());
   View* v = GetEventHandlerForPoint(event.location());
   // Find the first enabled view, or the existing move handler, whichever comes
   // first.  The check for the existing handler is because if a view becomes
   // disabled while handling moves, it's wrong to suddenly send ET_MOUSE_EXITED
   // and ET_MOUSE_ENTERED events, because the mouse hasn't actually exited yet.
   while (v && !v->enabled() && (v != mouse_move_handler_))
     v = v->parent();
   if (v && v != this) {
     if (v != mouse_move_handler_) {
       if (mouse_move_handler_ != NULL &&
@@ skipping 238 matching lines @@
 
 #ifndef NDEBUG
   DCHECK(!event_dispatch_target_ || Contains(event_dispatch_target_));
 #endif
 
   return details;
 }
 
 }  // namespace internal
 }  // namespace views