metrics: Protobuf supports profiling upon restoring session

metrics: Protobuf supports profiling upon restoring session

BUG=chromium:358778
TEST=build successfully

Signed-off-by: Simon Que <sque@chromium.org>;

R=dhsharp@chromium.org, isherman@chromium.org, rapati@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=277241

[Ilya Sherman, 2014-06-13 20:55:59]

LGTM, thanks.

[Ilya Sherman, 2014-06-13 20:56:02]

The CQ bit was checked by isherman@chromium.org

[commit-bot: I haz the power, 2014-06-13 20:57:52]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sque@chromium.org/337813002/1

[commit-bot: I haz the power, 2014-06-14 02:52:24]

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

[commit-bot: I haz the power, 2014-06-14 02:52:25]

Try jobs failed on following builders:
  mac_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_compile_...)

[Simon Que, 2014-06-14 18:06:39]

The CQ bit was checked by sque@chromium.org

[commit-bot: I haz the power, 2014-06-14 18:06:53]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sque@chromium.org/337813002/1

[commit-bot: I haz the power, 2014-06-14 19:22:36]

Change committed as 277241