[telemetry] Fix types and type checks of numeric results.

tools/perf/benchmarks/dromaeo.py

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 
 from telemetry import test
 from telemetry.core import util
 from telemetry.page import page_measurement
 from telemetry.page import page_set
@@ skipping 12 matching lines @@
       chars = [' ', '-', '/', '(', ')', '*']
       for c in chars:
         k = k.replace(c, '_')
       return k
 
     suffix = page.url[page.url.index('?') + 1 : page.url.index('&')]
     for k, v in score.iteritems():
       data_type = 'unimportant'
       if k == suffix:
         data_type = 'default'
-      results.Add(Escape(k), 'runs/s', v, data_type=data_type)
+      results.Add(Escape(k), 'runs/s', float(v), data_type=data_type)
 
 
 class _DromaeoBenchmark(test.Test):
   """A base class for Dromaeo benchmarks."""
   test = _DromaeoMeasurement
 
   def CreatePageSet(self, options):
     """Makes a PageSet for Dromaeo benchmarks."""
     # Subclasses are expected to define a class member called query_param.
     if not hasattr(self, 'query_param'):
@@ skipping 87 matching lines @@
   """Dromaeo JSLib traverse jquery JavaScript benchmark"""
   tag = 'jslibtraversejquery'
   query_param = 'jslib-traverse-jquery'
 
 
 class DromaeoJslibTraversePrototype(_DromaeoBenchmark):
   """Dromaeo JSLib traverse prototype JavaScript benchmark"""
   tag = 'jslibtraverseprototype'
   query_param = 'jslib-traverse-prototype'