Roll pdfium, add GN build for pdf and pdfium.

Pdfium changes:
d68f9a3  Add GN build file for pdfium, rename GYP target.
f0a5576  fix two uninitialized reads
https://code.google.com/p/pdfium/issues/detail?id=9
https://code.google.com/p/pdfium/issues/detail?id=10
bb2b1e7  Use unsigned type for iteration to avoid int overflow.
62a7fd6  Wrong variable assignment in Pdfium.

In the GN build this separates out the no-exceptions flag since pdfium must be compiled with exceptions enabled.

Updates pdfium naming in GYP from fpdfsdk.

Removes src/pdf from .gitignore now that it is checked in.

BUG=
[email protected]

Review URL: https://codereview.chromium.org/315313002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275269 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed