Fix crash on NULL pointer when the browser is compiled with use_cups=0

Fix crash on NULL pointer when the browser is compiled with use_cups=0

Please see https://bugs.gentoo.org/show_bug.cgi?id=530682 for context.

The idea is to make cups dependency optional at compile time. Even without
cups one can print to file (pdf) or use cloud print.

BUG=none
R=thestig@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/57e9761e4828e1a41af2766c09c700017aa75ba1

[Paweł Hajdan Jr., 2015-01-21 11:09:28]

phajdan.jr@chromium.org changed reviewers:
+ thestig@chromium.org

[Lei Zhang, 2015-01-21 21:20:01]

lgtm

Have you tried this to see how printing behaves without cups? There's both print
preview (ctrl-p) and the native print dialog. (ctrl-shift-p)

[Paweł Hajdan Jr., 2015-01-22 09:48:37]

On 2015/01/21 21:20:01, Lei Zhang wrote:
> lgtm
> 
> Have you tried this to see how printing behaves without cups? There's both
print
> preview (ctrl-p) and the native print dialog. (ctrl-shift-p)

Yes, both of them work well with this patch. Printing to file / cloud print seem
available.

[commit-bot: I haz the power, 2015-01-22 09:51:58]

Patchset 2 (id:??) landed as
https://crrev.com/57e9761e4828e1a41af2766c09c700017aa75ba1
Cr-Commit-Position: refs/heads/master@{#312594}

[Paweł Hajdan Jr., 2015-01-22 09:52:09]

Committed patchset #2 (id:20001) manually as
57e9761e4828e1a41af2766c09c700017aa75ba1 (presubmit successful).