telemetry: re-enable smoothness.tough_canvas_cases on Android.

tools/perf/measurements/smoothness.py

Index: tools/perf/measurements/smoothness.py
diff --git a/tools/perf/measurements/smoothness.py b/tools/perf/measurements/smoothness.py
index f7626e8d8e9bf7199f5d3a979e4fbaf81f478974..3bfd0ce5b63104f905f8d6a0563ff12a4bab6887 100644
--- a/tools/perf/measurements/smoothness.py
+++ b/tools/perf/measurements/smoothness.py
@@ -2,8 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import sys
-
 from metrics import smoothness
 from metrics import timeline
 from telemetry.page import page_test
@@ -33,13 +31,6 @@ class Smoothness(page_measurement.PageMeasurement):
   def CustomizeBrowserOptions(self, options):
     options.AppendExtraBrowserArgs('--enable-gpu-benchmarking')
 
-    # smoothness.tough_canvas_cases fails on Android.
-    # TODO(ernstm): Re-enable this test when crbug.com/311582 is fixed.
-    if (sys.platform == 'android' and
-        (sys.argv[-1].endswith('tough_canvas_cases'))):
-      print '%s is currently disabled on Android. Skipping test.' % sys.argv[-1]
-      sys.exit(0)
-
   def CanRunForPage(self, page):
     return hasattr(page, 'smoothness')