[Startup Tracing] Separate TraceOptions and CategoryFilter

[Startup Tracing] Separate TraceOptions and CategoryFilter

This CL moves CategoryFilter and TraceOptions to their own files. This is the first step to replace CategoryFilter and TraceOptions by a unified TraceConfig class. There are three steps.

1- Move current CategoryFilter and TraceOptions to new file.
2- Create TraceConfig but don't use it anywhere
3- Hookup TraceConfig and remove CategoryFilter and TraceOptions.

Background:
Implementing TraceConfig is the first stage for startup tracing.

Startup tracing design doc:
https://docs.google.com/document/d/1yRCXhrQ-0rsfUgNHt9T4YdnmJYrXKN6aK56Ozk3kPVc/edit?usp=sharing

TraceConfig class design doc:
https://docs.google.com/document/d/1zwc6FdeYyrC7m9fC4jJqbkqpB0il9NV-MWH7lEnL0cc/edit?usp=sharing

trace-config file format doc:
https://docs.google.com/document/d/1auY0Buk-R2tGCzpHJzFgyTfngXTAK0mlxJc6J4M_CK4/edit?usp=sharing

BUG=317481, 482098
Committed: https://crrev.com/daaba16762de04f5fdf16b510409e1eabb122e6e
Cr-Commit-Position: refs/heads/master@{#331386}

[Zhen Wang, 2015-05-26 03:43:23]

zhenw@chromium.org changed reviewers:
+ dsinclair@chromium.org, nduca@chromium.org, nednguyen@google.com,
pasko@chromium.org

[Zhen Wang, 2015-05-26 03:43:24]

ptal

By the way, do you know why some trybots failed? It compiles fine on my local
machine and on other bots.

[dsinclair, 2015-05-26 13:41:21]

lgtm.

It looks like all the failed compiles are using the GN scripts. Can you do a
local build with GN instead of GYP and see if it succeeds?

[Zhen Wang, 2015-05-26 15:31:39]

On 2015/05/26 13:41:21, dsinclair wrote:
> lgtm.
> 
> It looks like all the failed compiles are using the GN scripts. Can you do a
> local build with GN instead of GYP and see if it succeeds?

I see. I added the GN build support. ptal.

[dsinclair, 2015-05-26 15:32:36]

The CQ bit was checked by dsinclair@chromium.org

[dsinclair, 2015-05-26 15:32:37]

lgtm

[commit-bot: I haz the power, 2015-05-26 15:34:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1154133003/20001

[commit-bot: I haz the power, 2015-05-26 17:26:02]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-05-26 17:27:30]

Patchset 2 (id:??) landed as
https://crrev.com/daaba16762de04f5fdf16b510409e1eabb122e6e
Cr-Commit-Position: refs/heads/master@{#331386}