Revert of Use instance type in Object::IsErrorObject().

Revert of Use instance type in Object::IsErrorObject(). (patchset #9 id:160001 of https://codereview.chromium.org/2090333002/ )

Reason for revert:
[Sheriff] Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/7700

Please rebase upstream first if intended.

Original issue's description:
> Use JS_ERROR_TYPE to check for error objects.
>
> Replace explicit Object::IsErrorObject() with macro generated functions Object::IsJSError() and HeapObject::IsJSError().
>
> BUG=
>
> Committed: https://crrev.com/90e4fd136387ca7271d8ea87f4fc667e4f55063b
> Cr-Commit-Position: refs/heads/master@{#37244}

TBR=verwaest@chromium.org,jochen@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/f0a03f0b9476aabf7f873ede40be41590cde445b
Cr-Commit-Position: refs/heads/master@{#37250}

[Michael Achenbach, 2016-06-24 11:52:08]

The CQ bit was checked by machenbach@chromium.org

[Michael Achenbach, 2016-06-24 11:52:09]

Created Revert of Use instance type in Object::IsErrorObject().

[commit-bot: I haz the power, 2016-06-24 11:52:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2092083002/1

[commit-bot: I haz the power, 2016-06-24 11:52:38]

Description was changed from

==========
Revert of Use instance type in Object::IsErrorObject(). (patchset #9 id:160001
of https://codereview.chromium.org/2090333002/ )

Reason for revert:
[Sheriff] Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream first if intended.

Original issue's description:
> Use JS_ERROR_TYPE to check for error objects.
> 
> Replace explicit Object::IsErrorObject() with macro generated functions
Object::IsJSError() and HeapObject::IsJSError().
> 
> BUG=
> 
> Committed: https://crrev.com/90e4fd136387ca7271d8ea87f4fc667e4f55063b
> Cr-Commit-Position: refs/heads/master@{#37244}

TBR=verwaest@chromium.org,jochen@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
==========

to

==========
Revert of Use instance type in Object::IsErrorObject(). (patchset #9 id:160001
of https://codereview.chromium.org/2090333002/ )

Reason for revert:
[Sheriff] Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream first if intended.

Original issue's description:
> Use JS_ERROR_TYPE to check for error objects.
> 
> Replace explicit Object::IsErrorObject() with macro generated functions
Object::IsJSError() and HeapObject::IsJSError().
> 
> BUG=
> 
> Committed: https://crrev.com/90e4fd136387ca7271d8ea87f4fc667e4f55063b
> Cr-Commit-Position: refs/heads/master@{#37244}

TBR=verwaest@chromium.org,jochen@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
==========

[commit-bot: I haz the power, 2016-06-24 11:52:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-24 11:53:00]

Description was changed from

==========
Revert of Use instance type in Object::IsErrorObject(). (patchset #9 id:160001
of https://codereview.chromium.org/2090333002/ )

Reason for revert:
[Sheriff] Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream first if intended.

Original issue's description:
> Use JS_ERROR_TYPE to check for error objects.
> 
> Replace explicit Object::IsErrorObject() with macro generated functions
Object::IsJSError() and HeapObject::IsJSError().
> 
> BUG=
> 
> Committed: https://crrev.com/90e4fd136387ca7271d8ea87f4fc667e4f55063b
> Cr-Commit-Position: refs/heads/master@{#37244}

TBR=verwaest@chromium.org,jochen@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
==========

to

==========
Revert of Use instance type in Object::IsErrorObject(). (patchset #9 id:160001
of https://codereview.chromium.org/2090333002/ )

Reason for revert:
[Sheriff] Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream first if intended.

Original issue's description:
> Use JS_ERROR_TYPE to check for error objects.
>
> Replace explicit Object::IsErrorObject() with macro generated functions
Object::IsJSError() and HeapObject::IsJSError().
>
> BUG=
>
> Committed: https://crrev.com/90e4fd136387ca7271d8ea87f4fc667e4f55063b
> Cr-Commit-Position: refs/heads/master@{#37244}

TBR=verwaest@chromium.org,jochen@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/f0a03f0b9476aabf7f873ede40be41590cde445b
Cr-Commit-Position: refs/heads/master@{#37250}
==========

[commit-bot: I haz the power, 2016-06-24 11:53:01]

Patchset 1 (id:??) landed as
https://crrev.com/f0a03f0b9476aabf7f873ede40be41590cde445b
Cr-Commit-Position: refs/heads/master@{#37250}