To avoid the requirement of defining unnecessary gyp variables for

To avoid the requirement of defining unnecessary gyp variables for
app-streaming builds, cleanup definition of those variables.
Move variables to common include file.

Tested by building in a shell with only
GYP_DEFINES': 'component=shared_library use_goma=1

BUG=

Committed: https://crrev.com/d58d70dbcee9d0537ca74861aefd82e02490b332
Cr-Commit-Position: refs/heads/master@{#322321}

[anandc, 2015-03-25 22:53:04]

anandc@chromium.org changed reviewers:
+ garykac@chromium.org

[anandc, 2015-03-25 22:53:04]

Hi Gary, PTAL. Thanks.

[garykac, 2015-03-25 22:54:29]

lgtm

[garykac, 2015-03-25 22:54:33]

The CQ bit was checked by garykac@chromium.org

[commit-bot: I haz the power, 2015-03-25 22:55:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1031203004/1

[anandc, 2015-03-25 23:09:25]

Patchset #2 (id:20001) has been deleted

[anandc, 2015-03-26 04:33:22]

The CQ bit was checked by anandc@chromium.org

[commit-bot: I haz the power, 2015-03-26 04:33:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1031203004/1

[commit-bot: I haz the power, 2015-03-26 04:48:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-26 04:49:09]

Patchset 1 (id:??) landed as
https://crrev.com/d58d70dbcee9d0537ca74861aefd82e02490b332
Cr-Commit-Position: refs/heads/master@{#322321}