[chrome_remote_control] Add pylint to PRESUMMIT and fix lint

tools/chrome_remote_control/chrome_remote_control/multi_page_benchmark_unittest.py

 # Copyright (c) 2012 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.
 from chrome_remote_control import multi_page_benchmark
 from chrome_remote_control import multi_page_benchmark_unittest_base
 
 class BenchThatFails(multi_page_benchmark.MultiPageBenchmark):
   def MeasurePage(self, page, tab):
     raise multi_page_benchmark.MeasurementFailure('Intentional failure.')
 
 class BenchThatHasDefaults(multi_page_benchmark.MultiPageBenchmark):
   def AddOptions(self, parser):
     parser.add_option('-x', dest='x', default=3)
 
   def MeasurePage(self, page, tab):
     assert self.options.x == 3
     return {'x': 7}
 
+class BenchForBlank(multi_page_benchmark.MultiPageBenchmark):
+  def MeasurePage(self, page, tab):
+    contents = tab.runtime.Evaluate('document.body.textContent')
+    assert contents.strip() == 'Hello world'
+
 class MultiPageBenchmarkUnitTest(
   multi_page_benchmark_unittest_base.MultiPageBenchmarkUnitTestBase):
 
+  def testGotToBlank(self):
+    ps = self.CreatePageSetFromFileInUnittestDataDir('blank.html')
+    benchmark = BenchForBlank()
+    all_results = self.RunBenchmark(benchmark, ps)
+    self.assertEquals(0, len(all_results.page_failures))
+
   def testFailure(self):
     ps = self.CreatePageSetFromFileInUnittestDataDir('blank.html')
     benchmark = BenchThatFails()
     all_results = self.RunBenchmark(benchmark, ps)
     self.assertEquals(1, len(all_results.page_failures))
 
   def testDefaults(self):
     ps = self.CreatePageSetFromFileInUnittestDataDir('blank.html')
     benchmark = BenchThatHasDefaults()
     all_results = self.RunBenchmark(benchmark, ps)
     self.assertEquals(len(all_results.page_results), 1)
     self.assertEquals(all_results.page_results[0]['results']["x"], 7)