Bug:chromium:617892

Change-Id: I9993191fb632ca49f020e8073e7e409c86932a29
Reviewed-on: https://chromium-review.googlesource.com/485202
Commit-Queue: Hitoshi Yoshida <peria@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44827}

This removes kDeoptTableSerializeEntryCount heuristic constant.

Review-Url: https://codereview.chromium.org/2790573002
Cr-Commit-Position: refs/heads/master@{#44379}

This requires serialized data to track the number of API-provided
external references separately.
And it flushes out a case of serialized data corruption (stored "length"
field too large) that we didn't handle without crashing.

BUG=v8:6055

Review-Url: https://codereview.chromium.org/2736923002
Cr-Commit-Position: refs/heads/master@{#43649}

Due to link-time optimizations functions with same code
can be folded into one, resulting in duplicate references.

R=jochen@chromium.org, peria@chromium.org
BUG=chromium:617892

Review-Url: https://codereview.chromium.org/2707903002
Cr-Commit-Position: refs/heads/master@{#43317}

R=peria@chromium.org, vogelheim@chromium.org
BUG=chromium:617892
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2495213003
Cr-Commit-Position: refs/heads/master@{#40981}

Revert of [serializer] print use count of external references. (patchset #2 id:20001 of https://codereview.chromium.org/2495213003/ )

Reason for revert:
Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20vtunejit/builds/14690 compile

Original issue's description:
> [serializer] print use count of external references.
>
> R=peria@chromium.org, vogelheim@chromium.org
> BUG=chromium:617892
> NOPRESUBMIT=true

TBR=peria@chromium.org,vogelheim@chromium.org,yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:617892

Review-Url: https://codereview.chromium.org/2498163003
Cr-Commit-Position: refs/heads/master@{#40980}

R=peria@chromium.org, vogelheim@chromium.org
BUG=chromium:617892
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2495213003
Cr-Commit-Position: refs/heads/master@{#40979}

Changes include:
 - Adding V8_EXPORT macro for SnapshotCreator
 - Removing outdated DCHECKs.
 - Allow nullptr as external reference. This required a...
 - Refactoring of hashmaps used by the serializer.
 - Remove external references for counters. These are not used
   anywhere for isolates that are being serialized.
 - Put template infos into the partial snapshot cache.
 - Remove unnecessary presubmit check for external references.
   mksnapshot crashes if external references are missing.

R=jochen@chromium.org, vogelheim@chromium.org
BUG=chromium:617892

Review-Url: https://codereview.chromium.org/2490783004
Cr-Commit-Position: refs/heads/master@{#40949}

R=bmeurer@chromium.org
BUG=v8:5197

Review-Url: https://codereview.chromium.org/2155633002
Cr-Commit-Position: refs/heads/master@{#37820}

The new location allows to add an external reference without requiring
an lgtm from a snapshot/ owner.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1812853002

Cr-Commit-Position: refs/heads/master@{#34858}