Split web developer tracing preset into web developer, and web developer with javascript

Add a preset for web developers that don't want javascript events

This patch adds an additional trace preset to support web developers not
interested in javascript tracing data (which can be large).

BUG=

[nduca, 2014-07-15 04:26:15]

v8 instrumentation is big in size? or, intrusive? or...

how does this compare to just movign the v8 probes that are big to
disabled-by-default?

[adamk, 2014-07-15 15:12:35]

I don't know if this is quite what I had in mind. Perhaps we need slightly more
fine-grained V8 tracing? At the moment, the V8 tracing fills up the buffer in 2
or 3 seconds. This seems to be a recent change...

[fmeawad, 2014-07-15 21:53:28]

On 2014/07/15 15:12:35, adamk wrote:
> I don't know if this is quite what I had in mind. Perhaps we need slightly
more
> fine-grained V8 tracing? At the moment, the V8 tracing fills up the buffer in
2
> or 3 seconds. This seems to be a recent change...

I have filed https://code.google.com/p/v8/issues/detail?id=3432 which tracks the
buffer filling quickly in V8.

[pdr1, 2014-07-20 16:45:50]

On 2014/07/15 21:53:28, fmeawad wrote:
> On 2014/07/15 15:12:35, adamk wrote:
> > I don't know if this is quite what I had in mind. Perhaps we need slightly
> more
> > fine-grained V8 tracing? At the moment, the V8 tracing fills up the buffer
in
> 2
> > or 3 seconds. This seems to be a recent change...
> 
> I have filed https://code.google.com/p/v8/issues/detail?id=3432 which tracks
the
> buffer filling quickly in V8.

I sent this off then left for a long vacation :/

It looks like this has been resolved on the v8 side. I'll confirm tomorrow, but
lets close this for now.