Reland: Add trace event Pepper API

Reland: Add trace event Pepper API

This facilitates adding trace data to chrome://tracing from plugins.

- broke out trace_event.h into trace_event.h/trace_event_internal.h
  for easier transplanting to plugin code by eliminating dependence on base/.
- inlined trace_event.cc methods (4 total) so the trace_event_internal
  implementation is contained in headers.
- added new PPB_TraceEvent_Dev interface (implemented entirely on the plugin
  side)

BUG=93839
TEST=base_unittests, manual for plugin testing


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=179171

[elijahtaylor1, 2013-01-25 00:16:24]

Trying to reland this change (https://codereview.chromium.org/11464005).  I
submitted a couple weeks ago but was quickly bounced because of incremental
build failures because of a nacl gyp dependency problem.  That's fixed, so this
should be green.

Waiting for trybots and will investigate redness, but looking for a rubberstamp
based on your previous lgtm on the change.

[brettw, 2013-01-25 00:19:47]

What has changed from the previous landing?

[elijahtaylor1, 2013-01-25 00:51:57]

On 2013/01/25 00:19:47, brettw wrote:
> What has changed from the previous landing?

Literally nothing with this change except a rebase, but I landed this in
native_client:

https://codereview.chromium.org/11882002/

Which was rolled into chrome here:

https://codereview.chromium.org/11975047/

This fixed dependency issues for untrusted nacl gyp builds which kept some of
the changes in this CL from being built properly on incremental builds.  It
passed all trybots which are clean builds but failed on nearly all buildbots
which I guess are incremental.

[brettw, 2013-01-25 05:55:53]

ah, thanks lgtm

[commit-bot: I haz the power, 2013-01-25 21:30:35]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/elijahtaylor@chromium.org/12047066/12001

[commit-bot: I haz the power, 2013-01-25 21:30:44]

Presubmit check for 12047066-12001 failed and returned exit status 1.


Running presubmit commit checks ...

** Presubmit ERRORS **
The name of PNG files should not have abbreviations. 
Use _hover.png, _center.png, instead of _h.png, _c.png.
Contact oshima@chromium.org if you have questions.
      ppapi/tests/all_c_includes.h

Presubmit checks took 3.0s to calculate.

[commit-bot: I haz the power, 2013-01-25 21:50:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/elijahtaylor@chromium.org/12047066/12001

[commit-bot: I haz the power, 2013-01-28 18:45:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/elijahtaylor@chromium.org/12047066/12001

[commit-bot: I haz the power, 2013-01-28 18:46:25]

Change committed as 179171