[Telemetry] Disable dom_perf on Android because it times out.

Linux is a casualty because we currently don't have a clean system to
differentiate the platforms.

TBR=tonyg@chromium.org
NOTRY=True
BUG=

Review URL: https://codereview.chromium.org/101043002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238298 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/benchmarks/dom_perf.py

@@ -5,6 +5,7 @@
 import json
 import math
 import os
+import sys
 
 from telemetry import test
 from telemetry.core import util
@@ -74,6 +75,8 @@ class DomPerf(test.Test):
   means better performance: Bigger is better!"""
   test = _DomPerfMeasurement
 
+  enabled = not sys.platform.startwith('linux')
+
   def CreatePageSet(self, options):
     dom_perf_dir = os.path.join(util.GetChromiumSrcDir(), 'data', 'dom_perf')
     base_page = 'file://run.html?reportInJS=1&run='