BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1413033014

Cr-Commit-Position: refs/heads/master@{#31777}

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1421973007

Cr-Commit-Position: refs/heads/master@{#31696}

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1420473003

Cr-Commit-Position: refs/heads/master@{#31612}

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1424863002

Cr-Commit-Position: refs/heads/master@{#31608}

This reverts commit 280a6f8e.

Reland of https://codereview.chromium.org/1380593002/

BUG=chromium:535160
LOG=n
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel;

Review URL: https://codereview.chromium.org/1390473003

Cr-Commit-Position: refs/heads/master@{#31094}

This is a simplified version of chromium's isolate driver:
- 'prepare' will create a *.isolate.gen.json with the
arguments to be used later.
- other modes will just be passed through to the isolate
script.

BUG=chromium:535160
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/1378133005

Cr-Commit-Position: refs/heads/master@{#31046}

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1361953003

Cr-Commit-Position: refs/heads/master@{#30943}