Add a script to profile chrome startup over adb, optionally with a combined systrace.

Add a script to profile chrome startup over adb, optionally with a combined systrace.

Originally written by pliard@ in https://codereview.chromium.org/263163002

BUG=361548

[azarchs, 2014-10-30 11:44:25]

azarchs@chromium.org changed reviewers:
+ pasko@chromium.org

[pasko, 2014-10-30 12:03:37]

pasko@chromium.org changed reviewers:
+ skyostil@chromium.org

[pasko, 2014-10-30 12:08:08]

I added BUG= here and a reference to original Philippe's change.

lgtm with a TODO for unifying with the tools/profile_chrome/* (profiler.py and
main.py), having startup tracing even with code duplication seems somewhat
better than not having it at all.

I'd like to hear what Sami says (CC-ed), please consider him the owner review
for this CL.

[Sami, 2014-10-30 13:49:09]

Is there a way we could avoid duplicating all this code from adb_profile_chrome?
It's 99% the same as far as I can tell. For example we could add another
executable script there that sets the command line and starts chrome but imports
all the identical parts from the other tool. WDYT?

[pasko, 2014-10-31 09:35:02]

On 2014/10/30 13:49:09, Sami wrote:
> Is there a way we could avoid duplicating all this code from
adb_profile_chrome?
> It's 99% the same as far as I can tell. For example we could add another
> executable script there that sets the command line and starts chrome but
imports
> all the identical parts from the other tool. WDYT?

As per offline discussion, azarchs@ is going to update it to share more code.

[Sami, 2014-10-31 12:50:01]

On 2014/10/31 09:35:02, pasko wrote:
> On 2014/10/30 13:49:09, Sami wrote:
> > Is there a way we could avoid duplicating all this code from
> adb_profile_chrome?
> > It's 99% the same as far as I can tell. For example we could add another
> > executable script there that sets the command line and starts chrome but
> imports
> > all the identical parts from the other tool. WDYT?
> 
> As per offline discussion, azarchs@ is going to update it to share more code.

Great, thank you!