[Android] Add support for standalone PDFium gn build on Android.

[Android] Add support for standalone PDFium gn build on Android.

This pulls in the android NDK and catapult, rolls chromium/src/build/,
and pulls in two .gni updates. It also fixes a few miscellaneous compile
failures in android-specific code.

BUG=pdfium:38
Committed: https://pdfium.googlesource.com/pdfium/+/7f3a15f714c8311b1adb7bdce1ac83c7113af598

[jbudorick, 2016-06-09 22:59:22]

Description was changed from

==========
[Android] Add support for standalone PDFium gn build on Android.

BUG=pdfium:38
==========

to

==========
[Android] Add support for standalone PDFium gn build on Android.

This pulls in the android NDK and catapult, rolls chromium/src/build/,
and pulls in two .gni updates. It also fixes a few miscellaneous compile
failures in android-specific code.

BUG=pdfium:38
==========

[jbudorick, 2016-06-10 01:21:13]

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

[jbudorick, 2016-06-10 01:21:14]

built with:
 - gcc+arm
 - gcc+arm64
 - clang+arm

Both pdfium_unittests and pdfium_embeddertests build and run but fail. I'll
address that in subsequent CLs.

[Lei Zhang, 2016-06-10 03:58:57]

lgtm

[jbudorick, 2016-06-10 13:14:04]

The CQ bit was checked by jbudorick@chromium.org

[jbudorick, 2016-06-10 13:14:05]

The patchset sent to the CQ was uploaded after l-g-t-m from thestig@chromium.org
Link to the patchset: https://codereview.chromium.org/2059553002/#ps40001
(title: "rebase")

[commit-bot: I haz the power, 2016-06-10 13:14:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2059553002/40001

[commit-bot: I haz the power, 2016-06-10 13:28:47]

Description was changed from

==========
[Android] Add support for standalone PDFium gn build on Android.

This pulls in the android NDK and catapult, rolls chromium/src/build/,
and pulls in two .gni updates. It also fixes a few miscellaneous compile
failures in android-specific code.

BUG=pdfium:38
==========

to

==========
[Android] Add support for standalone PDFium gn build on Android.

This pulls in the android NDK and catapult, rolls chromium/src/build/,
and pulls in two .gni updates. It also fixes a few miscellaneous compile
failures in android-specific code.

BUG=pdfium:38

Committed:
https://pdfium.googlesource.com/pdfium/+/7f3a15f714c8311b1adb7bdce1ac83c7113a...
==========

[commit-bot: I haz the power, 2016-06-10 13:28:48]

Committed patchset #3 (id:40001) as
https://pdfium.googlesource.com/pdfium/+/7f3a15f714c8311b1adb7bdce1ac83c7113a...