Revert "Support warning decorations in Timeline flame chart based on trace events"

Revert "Support warning decorations in Timeline flame chart based on trace events"
Revert "Build fix after r173654"

Reverts r173654 and r173655. Broke inspector/tracing-session-id.html.

TBR=yurys@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=173701

[ojan, 2014-05-09 00:21:42]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-05-09 00:23:16]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ojan@chromium.org/276793002/20001

[commit-bot: I haz the power, 2014-05-09 00:23:17]

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

[commit-bot: I haz the power, 2014-05-09 00:23:18]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[ojan, 2014-05-09 00:34:11]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-05-09 00:35:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ojan@chromium.org/276793002/20001

[commit-bot: I haz the power, 2014-05-09 01:46:25]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  mac_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/6264)

[commit-bot: I haz the power, 2014-05-09 02:22:26]

Change committed as 173701