This backport does not include the original changes to SLOW_DCHECK
as it does not exist in the V8 in node v4.x

Original commit message:
  Filter out stale left-trimmed handles

  BUG=chromium:620553
  LOG=N
  R=jochen@chromium.org

  Review-Url: https://codereview.chromium.org/2078403002
  Cr-Commit-Position: refs/heads/master@{#37108}

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This backport does not include the changes to `src/heap/scavenger.cc`
as it does not exist in the V8 included in the v4.x stream.

Original commit message:
  Filter out stale left-trimmed handles for scavenges

  The missing part from
    https://codereview.chromium.org/2078403002/

  R=jochen@chromium.org
  BUG=chromium:621869
  LOG=N

  Review-Url: https://codereview.chromium.org/2077353004
  Cr-Commit-Position: refs/heads/master@{#37184}

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This commit does not include the changes to `src/heap/scavenger.cc`.

These changes would revert the changes that should have come in
086bd5aede, meaning that there is no issue with that change missing
in the previous commit.

Original commit message:
  Iterate handles with special left-trim visitor

  BUG=chromium:620553
  LOG=N
  R=hpayer@chromium.org

  Review-Url: https://codereview.chromium.org/2102243002
  Cr-Commit-Position: refs/heads/master@{#37366}

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This backport does not include the original changes to SLOW_DCHECK
as it does not exist in the V8 in node v4.x

Original commit message:
  Filter out stale left-trimmed handles

  BUG=chromium:620553
  LOG=N
  R=jochen@chromium.org

  Review-Url: https://codereview.chromium.org/2078403002
  Cr-Commit-Position: refs/heads/master@{#37108}

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This backport does not include the changes to `src/heap/scavenger.cc`
as it does not exist in the V8 included in the v4.x stream.

Original commit message:
  Filter out stale left-trimmed handles for scavenges

  The missing part from
    https://codereview.chromium.org/2078403002/

  R=jochen@chromium.org
  BUG=chromium:621869
  LOG=N

  Review-Url: https://codereview.chromium.org/2077353004
  Cr-Commit-Position: refs/heads/master@{#37184}

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This commit does not include the changes to `src/heap/scavenger.cc`.

These changes would revert the changes that should have come in
086bd5aede, meaning that there is no issue with that change missing
in the previous commit.

Original commit message:
  Iterate handles with special left-trim visitor

  BUG=chromium:620553
  LOG=N
  R=hpayer@chromium.org

  Review-Url: https://codereview.chromium.org/2102243002
  Cr-Commit-Position: refs/heads/master@{#37366}

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

PR-URL: #10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This backport does not include the original changes to SLOW_DCHECK
as it does not exist in the V8 in node v4.x

Original commit message:
  Filter out stale left-trimmed handles

  BUG=chromium:620553
  LOG=N
  R=jochen@chromium.org

  Review-Url: https://codereview.chromium.org/2078403002
  Cr-Commit-Position: refs/heads/master@{#37108}

PR-URL: nodejs/node#10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This backport does not include the changes to `src/heap/scavenger.cc`
as it does not exist in the V8 included in the v4.x stream.

Original commit message:
  Filter out stale left-trimmed handles for scavenges

  The missing part from
    https://codereview.chromium.org/2078403002/

  R=jochen@chromium.org
  BUG=chromium:621869
  LOG=N

  Review-Url: https://codereview.chromium.org/2077353004
  Cr-Commit-Position: refs/heads/master@{#37184}

PR-URL: nodejs/node#10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

This commit does not include the changes to `src/heap/scavenger.cc`.

These changes would revert the changes that should have come in
086bd5aede, meaning that there is no issue with that change missing
in the previous commit.

Original commit message:
  Iterate handles with special left-trim visitor

  BUG=chromium:620553
  LOG=N
  R=hpayer@chromium.org

  Review-Url: https://codereview.chromium.org/2102243002
  Cr-Commit-Position: refs/heads/master@{#37366}

PR-URL: nodejs/node#10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

PR-URL: nodejs/node#10668
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>