Don't synthesize mousemove events if the mouse cursor is not on the widget

ui/views/widget/widget.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/widget.h"
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/default_theme_provider.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/base/l10n/l10n_font_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/layer.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/controls/menu/menu_controller.h"
+#include "ui/views/event_monitor.h"
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/focus/focus_manager_factory.h"
 #include "ui/views/focus/view_storage.h"
 #include "ui/views/focus/widget_focus_manager.h"
 #include "ui/views/views_delegate.h"
 #include "ui/views/widget/native_widget_private.h"
 #include "ui/views/widget/root_view.h"
 #include "ui/views/widget/tooltip_manager.h"
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/views/widget/widget_deletion_observer.h"
@@ skipping 947 matching lines @@
 
 const TooltipManager* Widget::GetTooltipManager() const {
   return native_widget_->GetTooltipManager();
 }
 
 gfx::Rect Widget::GetWorkAreaBoundsInScreen() const {
   return native_widget_->GetWorkAreaBoundsInScreen();
 }
 
 void Widget::SynthesizeMouseMoveEvent() {
+  // In screen coordinate.
+  gfx::Point mouse_location = EventMonitor::GetLastMouseLocation();
+  if (!GetWindowBoundsInScreen().Contains(mouse_location))
+      return;
+
+  // Convert: screen coordinate -> widget coordinate.
+  View::ConvertPointFromScreen(root_view_.get(), &mouse_location);
   last_mouse_event_was_move_ = false;
-  ui::MouseEvent mouse_event(ui::ET_MOUSE_MOVED, last_mouse_event_position_,
-                             last_mouse_event_position_, ui::EventTimeForNow(),
+  ui::MouseEvent mouse_event(ui::ET_MOUSE_MOVED, mouse_location,
+                             mouse_location, ui::EventTimeForNow(),
                              ui::EF_IS_SYNTHESIZED, 0);
   root_view_->OnMouseMoved(mouse_event);
 }
 
 void Widget::OnRootViewLayout() {
   native_widget_->OnRootViewLayout();
 }
 
 bool Widget::IsTranslucentWindowOpacitySupported() const {
   return native_widget_->IsTranslucentWindowOpacitySupported();
@@ skipping 479 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views