GN: fix bootstrap

GN: fix bootstrap

//base/trace_event/memory_dump_manager.cc now needs the generated
//base/debug/debugging_flags.h file.

Generating that file when building manually with ninja fixes
bootstrapping.

R=brettw@chromium.org
BUG=

Committed: https://crrev.com/c86fe9393074586d43d9b83ee2866cfa201ad7d4
Cr-Commit-Position: refs/heads/master@{#391055}

[brettw, 2016-05-02 17:11:11]

lgtm

[NGG, 2016-05-02 20:34:27]

The CQ bit was checked by ngg@ngg.hu

[commit-bot: I haz the power, 2016-05-02 20:34:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1929403002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1929403002/1

[commit-bot: I haz the power, 2016-05-02 21:24:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-02 21:25:46]

Description was changed from

==========
GN: fix bootstrap

//base/trace_event/memory_dump_manager.cc now needs the generated
//base/debug/debugging_flags.h file.

Generating that file when building manually with ninja fixes
bootstrapping.

R=brettw@chromium.org
BUG=
==========

to

==========
GN: fix bootstrap

//base/trace_event/memory_dump_manager.cc now needs the generated
//base/debug/debugging_flags.h file.

Generating that file when building manually with ninja fixes
bootstrapping.

R=brettw@chromium.org
BUG=

Committed: https://crrev.com/c86fe9393074586d43d9b83ee2866cfa201ad7d4
Cr-Commit-Position: refs/heads/master@{#391055}
==========

[commit-bot: I haz the power, 2016-05-02 21:25:47]

Patchset 1 (id:??) landed as
https://crrev.com/c86fe9393074586d43d9b83ee2866cfa201ad7d4
Cr-Commit-Position: refs/heads/master@{#391055}