DevTools: Focus the newly selected panel with Ctrl+[ and Ctrl+]
DevTools: Focus the newly selected panel with Ctrl+[ and Ctrl+]

Bug: 872438
Change-Id: I72790fccc75bc4ac0bdf457cbb960a53019ab974
Reviewed-on: https://chromium-review.googlesource.com/1182614
Reviewed-by: Erik Luo <26192f5e05d23e5ee959014fb911d780e566545b@chromium.org>
Commit-Queue: Joel Einbinder <bab755abe9fee48fe544272e55f73517d4e4a725@chromium.org>
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#594814}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: a0c855085ddbf0e70feb3428e63198c516cc6ff1
ChromeDevTools/devtools-frontend,dart-archive/devtools-frontend,dart-archive/devtools-frontend,ChromeDevTools/devtools-frontend,dart-archive/devtools-frontend,dart-archive/devtools-frontend,ChromeDevTools/devtools-frontend,dart-archive/devtools-frontend,ChromeDevTools/devtools-frontend,dart-archive/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend