Add "actively refresh services" method to ServiceDiscoveryClient

Add "actively refresh services" method to ServiceDiscoveryClient

Add method to ServiceDiscoveryClient that will allow it to actively refresh
stale services when their TTL runs out.

BUG=336883
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247857

[Vitaly Buka (NO REVIEWS), 2014-01-22 19:52:15]

lgtm

[commit-bot: I haz the power, 2014-01-27 19:56:28]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/noamsml@chromium.org/141583010/50001

[commit-bot: I haz the power, 2014-01-27 20:28:51]

Retried try job too often on mac_rel for step(s) base_unittests, browser_tests,
interactive_ui_tests, net_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_rel&nu...

[commit-bot: I haz the power, 2014-01-27 21:10:28]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/noamsml@chromium.org/141583010/50001

[commit-bot: I haz the power, 2014-01-28 00:06:45]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/noamsml@chromium.org/141583010/50001

[commit-bot: I haz the power, 2014-01-28 02:29:33]

Retried try job too often on mac_rel for step(s) app_list_unittests,
base_unittests, browser_tests, cacheinvalidation_unittests, cc_unittests,
check_deps, check_deps2git, chromedriver_unittests, components_unittests,
content_browsertests, content_unittests, crypto_unittests,
google_apis_unittests, gpu_unittests, interactive_ui_tests, ipc_tests,
jingle_unittests, media_unittests, message_center_unittests, nacl_integration,
net_unittests, ppapi_unittests, printing_unittests, remoting_unittests,
sql_unittests, sync_integration_tests, sync_unit_tests,
telemetry_perf_unittests, telemetry_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_rel&nu...

[commit-bot: I haz the power, 2014-01-28 18:21:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/noamsml@chromium.org/141583010/50001

[commit-bot: I haz the power, 2014-01-28 21:23:26]

Retried try job too often on mac_rel for step(s) app_list_unittests,
base_unittests, browser_tests, cacheinvalidation_unittests, cc_unittests,
check_deps, check_deps2git, chromedriver_unittests, components_unittests,
content_browsertests, content_unittests, crypto_unittests,
google_apis_unittests, gpu_unittests, interactive_ui_tests, ipc_tests,
jingle_unittests, media_unittests, message_center_unittests, nacl_integration,
net_unittests, ppapi_unittests, printing_unittests, remoting_unittests,
sql_unittests, sync_integration_tests, sync_unit_tests,
telemetry_perf_unittests, telemetry_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_rel&nu...

[commit-bot: I haz the power, 2014-01-28 21:24:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/noamsml@chromium.org/141583010/50001

[commit-bot: I haz the power, 2014-01-28 23:03:41]

Retried try job too often on mac_rel for step(s) app_list_unittests,
base_unittests, browser_tests, cacheinvalidation_unittests, cc_unittests,
check_deps, check_deps2git, chromedriver_unittests, components_unittests,
content_browsertests, content_unittests, crypto_unittests,
google_apis_unittests, gpu_unittests, interactive_ui_tests, ipc_tests,
jingle_unittests, media_unittests, message_center_unittests, nacl_integration,
net_unittests, ppapi_unittests, printing_unittests, remoting_unittests,
sql_unittests, sync_integration_tests, sync_unit_tests,
telemetry_perf_unittests, telemetry_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_rel&nu...

[commit-bot: I haz the power, 2014-01-28 23:24:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/noamsml@chromium.org/141583010/50001

[commit-bot: I haz the power, 2014-01-29 00:50:45]

Retried try job too often on mac_rel for step(s) app_list_unittests,
base_unittests, browser_tests, cacheinvalidation_unittests, cc_unittests,
check_deps, check_deps2git, chromedriver_unittests, components_unittests,
content_browsertests, content_unittests, crypto_unittests,
google_apis_unittests, gpu_unittests, interactive_ui_tests, ipc_tests,
jingle_unittests, media_unittests, message_center_unittests, nacl_integration,
net_unittests, ppapi_unittests, printing_unittests, remoting_unittests,
sql_unittests, sync_integration_tests, sync_unit_tests,
telemetry_perf_unittests, telemetry_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_rel&nu...

[commit-bot: I haz the power, 2014-01-29 23:14:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/noamsml@chromium.org/141583010/110001

[commit-bot: I haz the power, 2014-01-30 06:46:39]

Change committed as 247857