[DevTools] Eliminate frameId and isContentScript from js protocol.

Replaced with auxData supplied by embedder.

BUG=631162

Review-Url: https://codereview.chromium.org/2215153002
Cr-Original-Commit-Position: refs/heads/master@{#410239}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: be29687013b17e0a1280414e4152f567091ab3bc
1 file changed