NativeViewHost should query its native view for the current cursor
Add an override of View::GetCursor() to NativeViewHost so
that the native view can be queried for the current mouse
cursor. Currently no such override exists, and the default
implementation in View::GetCursor() does not always return
the correct value.
BUG=349118,351469
TEST=NativeViewHostAuraTest.CursorForNativeView
Review URL: https://codereview.chromium.org/
195723002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256934 0039d316-1c4b-4281-b951-d872f2087c98