Avoid integer overflows in FXGE_GetGlyphsBBox().

Avoid integer overflows in FXGE_GetGlyphsBBox().

And also CFX_RenderDevice::DrawNormalText().

BUG=637192
Committed: https://pdfium.googlesource.com/pdfium/+/19cdfe4d73370b21709aefd9dce06cf463239fa1

[Lei Zhang, 2016-08-12 09:03:30]

The CQ bit was checked by thestig@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-12 09:03:34]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-12 09:23:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-12 09:23:24]

Dry run: This issue passed the CQ dry run.

[Lei Zhang, 2016-08-13 02:21:46]

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

[Oliver Chang, 2016-08-15 19:10:00]

lgtm

[Lei Zhang, 2016-08-15 20:47:41]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2016-08-15 20:47:44]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-15 21:33:24]

Description was changed from

==========
Avoid integer overflows in FXGE_GetGlyphsBBox().

And also CFX_RenderDevice::DrawNormalText().

BUG=637192
==========

to

==========
Avoid integer overflows in FXGE_GetGlyphsBBox().

And also CFX_RenderDevice::DrawNormalText().

BUG=637192

Committed:
https://pdfium.googlesource.com/pdfium/+/19cdfe4d73370b21709aefd9dce06cf46323...
==========

[commit-bot: I haz the power, 2016-08-15 21:33:25]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/19cdfe4d73370b21709aefd9dce06cf46323...