Fix incorrect variable shadowing
Fix incorrect variable shadowing

The underscore migration of ProfileLauncher in https://crrev.com/c/3085190
resulted in a bug, where the ProfileLauncher's contentElement was
incorrectly shadowing the parent's contentElement instead of referring
to its own member variable.

Bug: chromium:1207342
Change-Id: Ia37b512978e4301fce7e6c4e8df80bd9e1ffbadf
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3103230
Commit-Queue: Jan Scheffler <8abd9e3d93041d096604cb2a1b3070dd7075ba7b@chromium.org>
Commit-Queue: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>
Auto-Submit: Jan Scheffler <8abd9e3d93041d096604cb2a1b3070dd7075ba7b@chromium.org>
Reviewed-by: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>
Reviewed-by: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>

ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend