This change returns translated position in the newly added overload MouseCursorMonitor::Callback::OnMouseCursorPosition(DesktopVector) callback. Meanwhile it also reduces the duplicate logic in Windows capturer implementations. So except for the deprecated logic in MouseCursorMonitorWin, all GetSystemMetrics() function calls are merged into GetScreenRect(), GetFullscreenRect() and GetFullscreenTopLeft() functions. Bug: webrtc:7950 Change-Id: Ic2a85a80b6947367bdd20d8f96f11e0f5c269006 Reviewed-on: https://chromium-review.googlesource.com/581951 Reviewed-by: Jamie Walch <jamiewalch@chromium.org> Reviewed-by: Zijie He <zijiehe@chromium.org> Commit-Queue: Zijie He <zijiehe@chromium.org> Cr-Commit-Position: refs/heads/master@{#19157}