Update WebView startup benchmark owners.

changwan@ has been looking into WebView startup performance; add as an
owner of the relevant benchmark to get notifications about bugs. Also
add component.

Change-Id: I34cac9a71d2c36129d40a0a34b1b2b940282b154
Reviewed-on: https://chromium-review.googlesource.com/1015540Reviewed-by: Changwan Ryu <changwan@chromium.org>
Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Commit-Queue: Richard Coles <torne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551538}

tools/perf/benchmark.csv

@@ -90,7 +90,7 @@ system_health.common_desktop,"charliea@chromium.org, nednguyen@chromium.org",
 system_health.common_mobile,"charliea@chromium.org, nednguyen@chromium.org, perezju@chromium.org",
 system_health.memory_desktop,perezju@chromium.org,
 system_health.memory_mobile,perezju@chromium.org,
-system_health.webview_startup,"perezju@chromium.org, torne@chromium.org",
+system_health.webview_startup,"perezju@chromium.org, torne@chromium.org, changwan@chromium.org",Mobile>WebView>Perf
 tab_switching.typical_25,vovoy@chromium.org,OS>Performance
 thread_times.key_hit_test_cases,"vmiura@chromium.org, sadrul@chromium.org",
 thread_times.key_idle_power_cases,skyostil@chromium.org,

tools/perf/benchmarks/system_health.py

@@ -156,7 +156,9 @@ class MobileMemorySystemHealth(_MemorySystemHealthBenchmark):
     return 'system_health.memory_mobile'
 
 
-@benchmark.Owner(emails=['perezju@chromium.org', 'torne@chromium.org'])
+@benchmark.Owner(emails=['perezju@chromium.org', 'torne@chromium.org',
+                         'changwan@chromium.org'],
+                 component='Mobile>WebView>Perf')
 class WebviewStartupSystemHealthBenchmark(perf_benchmark.PerfBenchmark):
   """Webview startup time benchmark