Merge to M50: Re-land "Only place primitive objects on the V8 global template."

Merge to M50: Re-land "Only place primitive objects on the V8 global template."

This reverts commit 1a35d55dd6b0d1ea1918e2d6a6c25faf599ba168.
Prevent handles from being destructed after v8 is gone.

BUG=pdfium:419, 600777
Original Review URL: https://codereview.chromium.org/1761073006 .

(cherry picked from commit 297b515e3d53095e36991480a194b54ce887757b)

R=tsepez@chromium.org

Committed: https://pdfium.googlesource.com/pdfium/+/f268cc9b8f4610acd22684ced01150e67c737fe7

[Oliver Chang, 2016-04-05 19:18:29]

ochang@chromium.org changed reviewers:
+ tsepez@chromium.org

[Oliver Chang, 2016-04-05 19:18:31]

Tom, for review. Minor conflict in Consts.cpp

[Tom Sepez, 2016-04-05 19:20:15]

lgtm

[Oliver Chang, 2016-04-05 19:22:22]

Description was changed from

==========
Merge to M50: Re-land "Only place primitive objects on the V8 global template."

This reverts commit 1a35d55dd6b0d1ea1918e2d6a6c25faf599ba168.
Prevent handles from being destructed after v8 is gone.

BUG=pdfium:419,600777

Original Review URL: https://codereview.chromium.org/1761073006 .

(cherry picked from commit 297b515e3d53095e36991480a194b54ce887757b)
==========

to

==========
Merge to M50: Re-land "Only place primitive objects on the V8 global template."

This reverts commit 1a35d55dd6b0d1ea1918e2d6a6c25faf599ba168.
Prevent handles from being destructed after v8 is gone.

BUG=pdfium:419,600777

Original Review URL: https://codereview.chromium.org/1761073006 .

(cherry picked from commit 297b515e3d53095e36991480a194b54ce887757b)

R=tsepez@chromium.org

Committed:
https://pdfium.googlesource.com/pdfium/+/f268cc9b8f4610acd22684ced01150e67c73...
==========

[Oliver Chang, 2016-04-05 19:22:23]

Committed patchset #2 (id:20001) manually as
f268cc9b8f4610acd22684ced01150e67c737fe7 (presubmit successful).