Chrome Version: 69.0.3472.0
OS: Windows

In issue 851958, it was found that in a few calls to RenderWidgetHostInputEventRouter::SendMouseEnterOrLeaveEvents, the specified target view is not within the specified root view.

See https://crash.corp.google.com/browse?q=expanded_custom_data.ChromeCrashProto.magic_signature_1.name%3D%27%5BDump+without+crash%5D+content%3A%3ARenderWidgetHostInputEventRouter%3A%3AReportMouseTargetNotInRoot%27 

This DumpWithoutCrashing has since been removed, but it indicates that:
- the specified root is indeed a root view
- the specified root is not mouse locked
- the root of the target is not mouse locked

The stack trace is as follows:
0x6878d6b0	(chrome.dll -render_widget_host_input_event_router.cc:799 )	content::RenderWidgetHostInputEventRouter::ReportMouseTargetNotInRoot(content::RenderWidgetHostViewBase *,content::RenderWidgetHostViewBase *)
0x67ef51ab	(chrome.dll -render_widget_host_input_event_router.cc:693 )	content::RenderWidgetHostInputEventRouter::SendMouseEnterOrLeaveEvents(blink::WebMouseEvent const &,content::RenderWidgetHostViewBase *,content::RenderWidgetHostViewBase *)
0x67ef505c	(chrome.dll -render_widget_host_input_event_router.cc:405 )	content::RenderWidgetHostInputEventRouter::DispatchMouseEvent(content::RenderWidgetHostViewBase *,content::RenderWidgetHostViewBase *,blink::WebMouseEvent const &,ui::LatencyInfo const &,base::Optional<gfx::PointF> const &)
0x67ef4ec4	(chrome.dll -render_widget_host_input_event_router.cc:1443 )	content::RenderWidgetHostInputEventRouter::DispatchEventToTarget(content::RenderWidgetHostViewBase *,content::RenderWidgetHostViewBase *,blink::WebInputEvent const &,ui::LatencyInfo const &,base::Optional<gfx::PointF> const &)
0x68795e90	(chrome.dll -render_widget_targeter.cc:276 )	content::RenderWidgetTargeter::FoundTarget(content::RenderWidgetHostViewBase *,content::RenderWidgetHostViewBase *,blink::WebInputEvent const &,ui::LatencyInfo const &,base::Optional<gfx::PointF> const &,bool)
0x67ef4858	(chrome.dll -render_widget_targeter.cc:167 )	content::RenderWidgetTargeter::FindTargetAndDispatch(content::RenderWidgetHostViewBase *,blink::WebInputEvent const &,ui::LatencyInfo const &)
0x67ef3ba6	(chrome.dll -render_widget_host_view_event_handler.cc:399 )	content::RenderWidgetHostViewEventHandler::OnMouseEvent(ui::MouseEvent *)
0x67ef38cf	(chrome.dll -render_widget_host_view_aura.cc:1620 )	content::RenderWidgetHostViewAura::OnMouseEvent(ui::MouseEvent *)
0x67ef28ec	(chrome.dll -event_handler.cc:27 )	ui::EventHandler::OnEvent(ui::Event *)
0x67ef286a	(chrome.dll -event_dispatcher.cc:191 )	ui::EventDispatcher::DispatchEvent(ui::EventHandler *,ui::Event *)
0x67ef24d6	(chrome.dll -event_dispatcher.cc:139 )	ui::EventDispatcher::ProcessEvent(ui::EventTarget *,ui::Event *)
0x67ef23bd	(chrome.dll -event_dispatcher.cc:86 )	ui::EventDispatcherDelegate::DispatchEventToTarget(ui::EventTarget *,ui::Event *)
0x67ef1849	(chrome.dll -event_dispatcher.cc:58 )	ui::EventDispatcherDelegate::DispatchEvent(ui::EventTarget *,ui::Event *)
0x67ef07c4	(chrome.dll -event_processor.cc:57 )	ui::EventProcessor::OnEventFromSource(ui::Event *)
0x68e3997e	(chrome.dll -event_source.cc:84 )	ui::EventSource::SendEventToSinkFromRewriter(ui::Event *,ui::EventRewriter const *)
0x67ef0699	(chrome.dll -event_source.cc:44 )	ui::EventSource::SendEventToSink(ui::Event *)
0x691f62e6	(chrome.dll -desktop_window_tree_host_win.cc:880 )	views::DesktopWindowTreeHostWin::HandleGestureEvent(ui::GestureEvent *)
0x67eeff71	(chrome.dll -hwnd_message_handler.cc:2821 )	views::HWNDMessageHandler::HandleMouseEventInternal(unsigned int,unsigned int,long,bool)
0x67eefc36	(chrome.dll -hwnd_message_handler.cc:999 )	views::HWNDMessageHandler::HandleMouseMessage(unsigned int,unsigned int,long,bool *)
0x67eefba4	(chrome.dll -legacy_render_widget_host_win.cc:319 )	content::LegacyRenderWidgetHostHWND::OnMouseRange(unsigned int,unsigned int,long,int &)
0x67e8e3d4	(chrome.dll -legacy_render_widget_host_win.h:84 )	content::LegacyRenderWidgetHostHWND::_ProcessWindowMessage(HWND__ *,unsigned int,unsigned int,long,long &,unsigned long)
0x67e8e282	(chrome.dll -legacy_render_widget_host_win.h:78 )	content::LegacyRenderWidgetHostHWND::ProcessWindowMessage(HWND__ *,unsigned int,unsigned int,long,long &,unsigned long)
0x67e8e19f	(chrome.dll -atlwin.h:3543 )	ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1073741824,0> >::WindowProc(HWND__ *,unsigned int,unsigned int,long)
......