Move pdf files into pdf.gypi

In preparation for make Chromium's skia.gyp use pdf.gypi.

Committed: http://code.google.com/p/skia/source/detail?r=10526

[djsollen, 2013-08-02 18:47:19]

lgtm with one nit

https://codereview.chromium.org/21952002/diff/1/gyp/pdf.gyp
File gyp/pdf.gyp (right):

https://codereview.chromium.org/21952002/diff/1/gyp/pdf.gyp#newcode21
gyp/pdf.gyp:21: 'pdf.gypi',
comment here...

# Makes the gypi appear in IDEs (but does not modify the build).

[robertphillips, 2013-08-02 18:50:59]

https://codereview.chromium.org/21952002/diff/1/gyp/pdf.gyp
File gyp/pdf.gyp (right):

https://codereview.chromium.org/21952002/diff/1/gyp/pdf.gyp#newcode21
gyp/pdf.gyp:21: 'pdf.gypi',
On 2013/08/02 18:47:19, djsollen wrote:
> comment here...
> 
> # Makes the gypi appear in IDEs (but does not modify the build).

Done.

[edisonn, 2013-08-02 19:23:26]

https://codereview.chromium.org/21952002/diff/5001/gyp/pdf.gypi
File gyp/pdf.gypi (right):

https://codereview.chromium.org/21952002/diff/5001/gyp/pdf.gypi#newcode47
gyp/pdf.gypi:47: # tab-width:2
seems tab width is 4, maybe we should preserve it to 2. in the actual file. your
choice

[commit-bot: I haz the power, 2013-08-04 15:01:31]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/robertphillips@google.com/21952002/5001

[commit-bot: I haz the power, 2013-08-04 15:09:24]

Change committed as 10526