[perf] Disable memory.blink_memory_mobile.reference on Nexus 5X

tools/perf/benchmarks/memory_infra.py

Index: tools/perf/benchmarks/memory_infra.py
diff --git a/tools/perf/benchmarks/memory_infra.py b/tools/perf/benchmarks/memory_infra.py
index f371f44d753891d4a7a0518b7b33f69f8c532e16..11947a67545647746270a5553acb1ff20bd319b3 100644
--- a/tools/perf/benchmarks/memory_infra.py
+++ b/tools/perf/benchmarks/memory_infra.py
@@ -165,6 +165,12 @@ class RendererMemoryBlinkMemoryMobile(_MemoryInfra):
     return (not _IGNORED_STATS_RE.search(value.name) and
             'renderer_processes' in value.name)
 
+  @classmethod
+  def ShouldDisable(cls, possible_browser):
+    # http://crbug.com/634319
+    return (possible_browser.browser_type == 'reference' and
+            possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
+
 
 class _MemoryV8Benchmark(_MemoryInfra):