[benchmarking] updated estimate for performance_browser_tests

The current estimate of performance_browser_tests is inaccurate. Updating the value based on actual runtime.

performance_browser_tests
estimate: 67 seconds
actual: ~165 seconds on linux-perf
             ~190 seconds mac-10_13_laptop_high_end-perf
             ~210 seconds mac-10_12_laptop_low_end-perf

Bug: chromium:1130157
Change-Id: I16e65e6e3a4fb6a9c43188174edc4483a6d3334a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2473000Reviewed-by: Jordan Bayles <jophba@chromium.org>
Commit-Queue: Jordan Bayles <jophba@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818251}

tools/perf/core/bot_platforms.py

@@ -319,7 +319,7 @@ _LINUX_EXECUTABLE_CONFIGS = frozenset([
     _base_perftests(10),
     _load_library_perf_tests(),
     _media_perftests(),
-    _performance_browser_tests(),
+    _performance_browser_tests(165),
     _tracing_perftests(),
 ])
 _MAC_HIGH_END_BENCHMARK_CONFIGS = PerfSuite(OFFICIAL_BENCHMARK_CONFIGS).Remove([
@@ -330,7 +330,7 @@ _MAC_HIGH_END_EXECUTABLE_CONFIGS = frozenset([
     _base_perftests(10),
     _dawn_perf_tests(330),
     _media_perftests(),
-    _performance_browser_tests(),
+    _performance_browser_tests(190),
     _views_perftests(),
 ])
 _MAC_LOW_END_BENCHMARK_CONFIGS = PerfSuite(OFFICIAL_BENCHMARK_CONFIGS).Remove([
@@ -339,7 +339,7 @@ _MAC_LOW_END_BENCHMARK_CONFIGS = PerfSuite(OFFICIAL_BENCHMARK_CONFIGS).Remove([
 ])
 _MAC_LOW_END_EXECUTABLE_CONFIGS = frozenset([
     _load_library_perf_tests(),
-    _performance_browser_tests(),
+    _performance_browser_tests(210),
 ])
 _MAC_ARM_DTK_BENCHMARK_CONFIGS = PerfSuite([
     _GetBenchmarkConfig('blink_perf.css')