ui::LocatedEvent location() returns gfx::PointF

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.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/desktop_aura/desktop_window_tree_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 1125 matching lines @@
   //
   // We can't do this later in the dispatch process because we share that
   // with ash, and ash gets confused about event IS_NON_CLIENT-ness on
   // events, since ash doesn't expect this bit to be set, because it's never
   // been set before. (This works on ash on Windows because none of the mouse
   // events on the ash desktop are clicking in what Windows considers to be a
   // non client area.) Likewise, we won't want to do the following in any
   // WindowTreeHost that hosts ash.
   if (content_window_ && content_window_->delegate()) {
     int flags = event->flags();
-    int hit_test_code =
-        content_window_->delegate()->GetNonClientComponent(event->location());
+    int hit_test_code = content_window_->delegate()->GetNonClientComponent(
+        gfx::ToFlooredPoint(event->location()));
     if (hit_test_code != HTCLIENT && hit_test_code != HTNOWHERE)
       flags |= ui::EF_IS_NON_CLIENT;
     event->set_flags(flags);
   }
 
   // While we unset the urgency hint when we gain focus, we also must remove it
   // on mouse clicks because we can call FlashFrame() on an active window.
   if (event->IsAnyButton() || event->IsMouseWheelEvent())
     FlashFrame(false);
 
@@ skipping 454 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme(window);
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views