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

ui/views/widget/widget_unittest.cc

Index: ui/views/widget/widget_unittest.cc
diff --git a/ui/views/widget/widget_unittest.cc b/ui/views/widget/widget_unittest.cc
index 08e15d5a724a563d6c8958fe083175a05c8e4dee..7d2691c0fdd5b7f12900cc37ab59826bb0bce2a3 100644
--- a/ui/views/widget/widget_unittest.cc
+++ b/ui/views/widget/widget_unittest.cc
@@ -1697,6 +1697,7 @@ TEST_F(WidgetTest, EventHandlersOnRootView) {
 TEST_F(WidgetTest, SynthesizeMouseMoveEvent) {
   Widget* widget = CreateTopLevelNativeWidget();
   View* root_view = widget->GetRootView();
+  root_view->SetBoundsRect(gfx::Rect(0, 0, 500, 500));
 
   EventCountView* v1 = new EventCountView();
   v1->SetBounds(0, 0, 10, 10);
@@ -1705,13 +1706,28 @@ TEST_F(WidgetTest, SynthesizeMouseMoveEvent) {
   v2->SetBounds(0, 10, 10, 10);
   root_view->AddChildView(v2);
 
+  // SynthesizeMouseMoveEvent does nothing until the mouse is entered.
+  widget->SynthesizeMouseMoveEvent();
+  EXPECT_EQ(0, v1->GetEventCount(ui::ET_MOUSE_MOVED));
+  EXPECT_EQ(0, v2->GetEventCount(ui::ET_MOUSE_MOVED));
+
   gfx::Point cursor_location(5, 5);
+  ui::MouseEvent enter(ui::ET_MOUSE_ENTERED, cursor_location, cursor_location,
+                       ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
+  widget->OnMouseEvent(&enter);
+
   ui::MouseEvent move(ui::ET_MOUSE_MOVED, cursor_location, cursor_location,
                       ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
   widget->OnMouseEvent(&move);
 
   EXPECT_EQ(1, v1->GetEventCount(ui::ET_MOUSE_ENTERED));
+  EXPECT_EQ(1, v1->GetEventCount(ui::ET_MOUSE_MOVED));
   EXPECT_EQ(0, v2->GetEventCount(ui::ET_MOUSE_ENTERED));
+  EXPECT_EQ(0, v2->GetEventCount(ui::ET_MOUSE_MOVED));
+
+  // SynthesizeMouseMoveEvent dispatches an mousemove event.
+  widget->SynthesizeMouseMoveEvent();
+  EXPECT_EQ(2, v1->GetEventCount(ui::ET_MOUSE_MOVED));
 
   delete v1;
   v2->SetBounds(0, 0, 10, 10);