Add a tool for clearing the system cache for a directory.

Add a tool for clearing the system cache for a directory.

This is a wrapper around existing functionality in
base/test/test_file_util.h.

This will be used in the cold startup Telemetry tests.

BUG=None

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=213941

[tonyg, 2013-07-25 21:30:42]

lgtm

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
File tools/perf/clear_system_cache/clear_system_cache.cc (right):

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
tools/perf/clear_system_cache/clear_system_cache.cc:39: continue;
Just a thought, but should we make this fatal and return 1 instead of
continuing. I'm wondering whether a perf test could try to clear the cache for a
file that got moved and silently fail with this error.

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
File tools/perf/clear_system_cache/clear_system_cache.gyp (right):

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
tools/perf/clear_system_cache/clear_system_cache.gyp:19:
'clear_system_cache.cc',
Should this be named clear_system_cache_main.cc?

[dtu, 2013-07-25 22:34:39]

This is another candidate for things that get zipped up into Cloud Storage.

[James Simonsen, 2013-07-26 02:14:00]

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
File tools/perf/clear_system_cache/clear_system_cache.cc (right):

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
tools/perf/clear_system_cache/clear_system_cache.cc:39: continue;
On 2013/07/25 21:30:42, tonyg wrote:
> Just a thought, but should we make this fatal and return 1 instead of
> continuing. I'm wondering whether a perf test could try to clear the cache for
a
> file that got moved and silently fail with this error.

Done.

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
File tools/perf/clear_system_cache/clear_system_cache.gyp (right):

https://codereview.chromium.org/20399002/diff/1/tools/perf/clear_system_cache...
tools/perf/clear_system_cache/clear_system_cache.gyp:19:
'clear_system_cache.cc',
On 2013/07/25 21:30:42, tonyg wrote:
> Should this be named clear_system_cache_main.cc?

Done.

[commit-bot: I haz the power, 2013-07-26 04:06:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/simonjam@chromium.org/20399002/7001

[commit-bot: I haz the power, 2013-07-26 17:05:46]

Change committed as 213941