Move blink_perf.xml_http_request benchmark to tools/perf/contrib/ directory

tools/perf/benchmarks/blink_perf.py

Index: tools/perf/benchmarks/blink_perf.py
diff --git a/tools/perf/benchmarks/blink_perf.py b/tools/perf/benchmarks/blink_perf.py
index fc2b6f82fe36699ff6153893456c90f8d2870711..64a55a45745c1d9636d99fab06c283beee54db78 100644
--- a/tools/perf/benchmarks/blink_perf.py
+++ b/tools/perf/benchmarks/blink_perf.py
@@ -298,13 +298,6 @@ class BlinkPerfShadowDOM(_BlinkPerfBenchmark):
     return possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X'
 
 
-# This benchmark is for local testing, doesn't need to run on bots.
-@benchmark.Disabled('all')
-@benchmark.Owner(emails=['tyoshino@chromium.org', 'hiroshige@chromium.org'])
-class BlinkPerfXMLHttpRequest(_BlinkPerfBenchmark):
-  tag = 'xml_http_request'
-  subdir = 'XMLHttpRequest'
-
 
 # Disabled on Windows and ChromeOS due to https://crbug.com/521887
 #@benchmark.Disabled('win', 'chromeos')