Remove Blink auto-roll script (scripts/tools/blink_roller/).

PRESUBMIT.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.
 
 """Top-level presubmit script for buildbot.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
 details on the presubmit API built into git cl.
 """
 
@@ skipping 91 matching lines @@
   tests.extend(input_api.canned_checks.GetUnitTestsInDirectory(
       input_api,
       output_api,
       input_api.os_path.join('scripts', 'common', 'unittests'),
       whitelist))
   tests.extend(input_api.canned_checks.GetUnitTestsInDirectory(
       input_api,
       output_api,
       input_api.os_path.join('scripts', 'tools', 'unittests'),
       whitelist))
-  tests.extend(input_api.canned_checks.GetUnitTestsInDirectory(
-      input_api,
-      output_api,
-      input_api.os_path.join('scripts', 'tools', 'blink_roller'),
-      whitelist))
 
   recipe_modules_tests = input_api.glob(
       join('scripts', 'slave', 'recipe_modules', '*', 'tests'))
   for path in recipe_modules_tests:
     tests.extend(input_api.canned_checks.GetUnitTestsInDirectory(
         input_api,
         output_api,
         path,
         whitelist))
 
@@ skipping 54 matching lines @@
 def CheckChangeOnUpload(input_api, output_api):
   return [] # Try-jobs/commit-queue do a better job of testing, faster.
 
 
 def CheckChangeOnCommit(input_api, output_api):
   output = CommonChecks(input_api, output_api)
   output.extend(ConditionalChecks(input_api, output_api))
   output.extend(CommitChecks(input_api, output_api))
   output.extend(BuildInternalCheck(output, input_api, output_api))
   return output