Use contents of python deps to get md5 stamp instead of paths only

Use contents of python deps to get md5 stamp instead of paths only

While contents of python dependencies doesn't affect contents of a depfile it
definitely affects the output: typical usage of CallAndWriteDepfileIfStale only
regenerates script's output if md5 sum changes, in a helper function. If content
of the python file (like lint.py) isn't used to generate md5 then it leads to
weird results: do a full build, change lint.py to always throw exception in
_OnStaleMd5, re-run build, but nothing happens, _OnStaleMd5 isn't called.

BUG=619329
Committed: https://crrev.com/3218d50d461833795d64c71f8b4c0517e58a8b50
Cr-Commit-Position: refs/heads/master@{#400012}

[mlopatkin, 2016-06-11 19:05:38]

Description was changed from

==========
Use contents of python deps to get md5 stamp instead of paths only

While contents of python dependencies doesn't affect contents of a depfile it
definitely affects the output: typical usage of CallAndWriteDepfileIfStale only
regenerates script's output if md5 sum changes, in a helper function. If content
of the python file (like lint.py) isn't used to generate md5 then it leads to
weird results: do a full build, change lint.py to always throw exception in
_OnStaleMd5, re-run build, but nothing happens, _OnStaleMd5 isn't called.

BUG=619329
==========

to

==========
Use contents of python deps to get md5 stamp instead of paths only

While contents of python dependencies doesn't affect contents of a depfile it
definitely affects the output: typical usage of CallAndWriteDepfileIfStale only
regenerates script's output if md5 sum changes, in a helper function. If content
of the python file (like lint.py) isn't used to generate md5 then it leads to
weird results: do a full build, change lint.py to always throw exception in
_OnStaleMd5, re-run build, but nothing happens, _OnStaleMd5 isn't called.

BUG=619329
==========

[mlopatkin, 2016-06-11 19:05:38]

mlopatkin@yandex-team.ru changed reviewers:
+ agrieve@chromium.org

[agrieve, 2016-06-15 17:27:13]

On 2016/06/11 19:07:34, mlopatkin wrote:

lgtm

[mlopatkin, 2016-06-15 20:14:19]

The CQ bit was checked by mlopatkin@yandex-team.ru to run a CQ dry run

[commit-bot: I haz the power, 2016-06-15 20:14:39]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2061573002/1

[commit-bot: I haz the power, 2016-06-15 21:11:12]

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

[commit-bot: I haz the power, 2016-06-15 21:11:14]

Dry run: This issue passed the CQ dry run.

[mlopatkin, 2016-06-15 21:17:07]

The CQ bit was checked by mlopatkin@yandex-team.ru

[commit-bot: I haz the power, 2016-06-15 21:17:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2061573002/1

[commit-bot: I haz the power, 2016-06-15 21:22:05]

Description was changed from

==========
Use contents of python deps to get md5 stamp instead of paths only

While contents of python dependencies doesn't affect contents of a depfile it
definitely affects the output: typical usage of CallAndWriteDepfileIfStale only
regenerates script's output if md5 sum changes, in a helper function. If content
of the python file (like lint.py) isn't used to generate md5 then it leads to
weird results: do a full build, change lint.py to always throw exception in
_OnStaleMd5, re-run build, but nothing happens, _OnStaleMd5 isn't called.

BUG=619329
==========

to

==========
Use contents of python deps to get md5 stamp instead of paths only

While contents of python dependencies doesn't affect contents of a depfile it
definitely affects the output: typical usage of CallAndWriteDepfileIfStale only
regenerates script's output if md5 sum changes, in a helper function. If content
of the python file (like lint.py) isn't used to generate md5 then it leads to
weird results: do a full build, change lint.py to always throw exception in
_OnStaleMd5, re-run build, but nothing happens, _OnStaleMd5 isn't called.

BUG=619329
==========

[commit-bot: I haz the power, 2016-06-15 21:22:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-15 21:23:54]

Description was changed from

==========
Use contents of python deps to get md5 stamp instead of paths only

While contents of python dependencies doesn't affect contents of a depfile it
definitely affects the output: typical usage of CallAndWriteDepfileIfStale only
regenerates script's output if md5 sum changes, in a helper function. If content
of the python file (like lint.py) isn't used to generate md5 then it leads to
weird results: do a full build, change lint.py to always throw exception in
_OnStaleMd5, re-run build, but nothing happens, _OnStaleMd5 isn't called.

BUG=619329
==========

to

==========
Use contents of python deps to get md5 stamp instead of paths only

While contents of python dependencies doesn't affect contents of a depfile it
definitely affects the output: typical usage of CallAndWriteDepfileIfStale only
regenerates script's output if md5 sum changes, in a helper function. If content
of the python file (like lint.py) isn't used to generate md5 then it leads to
weird results: do a full build, change lint.py to always throw exception in
_OnStaleMd5, re-run build, but nothing happens, _OnStaleMd5 isn't called.

BUG=619329

Committed: https://crrev.com/3218d50d461833795d64c71f8b4c0517e58a8b50
Cr-Commit-Position: refs/heads/master@{#400012}
==========

[commit-bot: I haz the power, 2016-06-15 21:23:55]

Patchset 1 (id:??) landed as
https://crrev.com/3218d50d461833795d64c71f8b4c0517e58a8b50
Cr-Commit-Position: refs/heads/master@{#400012}