[DevTools] Merge navigations control into requests interception

Bug: 546953, 702384
Change-Id: I73460b641d4083d615dfffb284aee8fd9cd1cdd7
Reviewed-on: https://chromium-review.googlesource.com/590348
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Alex Clarke <alexclarke@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490912}
24 files changed