Disabled more reference builds on the Nexus5X due to the TimeoutException error

tools/perf/benchmarks/v8.py

Index: tools/perf/benchmarks/v8.py
diff --git a/tools/perf/benchmarks/v8.py b/tools/perf/benchmarks/v8.py
index 65d28257d1afbab785b5560b4453268ba9f6d492..2dcf359e2b19f4265e4d989847a40177656bbf2e 100644
--- a/tools/perf/benchmarks/v8.py
+++ b/tools/perf/benchmarks/v8.py
@@ -51,6 +51,11 @@ class V8KeyMobileSites(perf_benchmark.PerfBenchmark):
   def Name(cls):
     return 'v8.key_mobile_sites_smooth'
 
+  @classmethod
+  def ShouldDisable(cls, possible_browser):  # http://crbug.com/597656
+      return (possible_browser.browser_type == 'reference' and
+              possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
+
 
 class V8DetachedContextAgeInGC(perf_benchmark.PerfBenchmark):
   """Measures the number of GCs needed to collect a detached context.
@@ -202,6 +207,11 @@ class V8MobileInfiniteScroll(_InfiniteScrollBenchmark):
   def Name(cls):
     return 'v8.mobile_infinite_scroll'
 
+  @classmethod
+  def ShouldDisable(cls, possible_browser):  # http://crbug.com/597656
+      return (possible_browser.browser_type == 'reference' and
+              possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
+
 
 class V8Adword(perf_benchmark.PerfBenchmark):
   """Measures V8 Execution metrics on the Adword page."""