Add cloud_print to the GN build.

Add cloud_print to the GN build.

There were some existing cloud_print targets that were hooked up only on Linux, but most of the code was Windows-only. This adds the missing targets and should bring us up to GYP parity.

Fix the cloud print size_t to int warnings and remove the warning disable from GYP.

Move generated resources file from cloud_print/resources.h to cloud_print/service/resources.h to match where the source file is.

Cloud print does some messy things to get the content switches constants, including the file directly in its sources and manually setting LINK_CONTENT_STATICALLY for all targets. In GN, this adds a static_switches target in content that does this in an official way.

Reland of https://codereview.chromium.org/1393123003/ with warning fixes
TBR=dpranke

Committed: https://crrev.com/70d2f990df7755c6e76aa20f156ff1f92a25f318
Cr-Commit-Position: refs/heads/master@{#354089}

[brettw, 2015-10-14 18:26:39]

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

[commit-bot: I haz the power, 2015-10-14 18:27:07]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1397433004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1397433004/1

[brettw, 2015-10-14 19:40:07]

The CQ bit was unchecked by brettw@chromium.org

[commit-bot: I haz the power, 2015-10-14 19:41:00]

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

[brettw, 2015-10-14 19:45:33]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-10-14 19:46:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1397433004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1397433004/1

[commit-bot: I haz the power, 2015-10-14 19:52:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-14 19:53:05]

Patchset 1 (id:??) landed as
https://crrev.com/70d2f990df7755c6e76aa20f156ff1f92a25f318
Cr-Commit-Position: refs/heads/master@{#354089}

[Mark P, 2015-10-14 20:21:32]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1409563002/ by mpearson@chromium.org.

The reason for reverting is: Causes compile failures:
http://build.chromium.org/p/chromium/builders/Win/builds/36509/steps/compile/...

ninja:error: 'gen/cloud_print/service_resources_en.rc', needed by
'obj/cloud_print/service/win/gen/cloud_print/cloud_print_service.service_resources_en.res',
missing and no known rule to make it
.