Add Chrome version check decorators

tools/chrome_proxy/webdriver/decorator_smoke.py

 # Copyright 2017 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 decorators import AndroidOnly
+from decorators import ChromeVersionAfterM
+from decorators import ChromeVersionBeforeM
 from common import ParseFlags
 from common import IntegrationTest
 
 
 class DecoratorSmokeTest(IntegrationTest):
 
   def AndroidOnlyFunction(self):
     # This function should never be called.
     self.fail()
 
   @AndroidOnly
   def testDecorator(self):
     # This test should always result as 'skipped' or pass if --android given.
     if not ParseFlags().android:
       self.AndroidOnlyFunction()
 
+  @ChromeVersionBeforeM(0)

[bengr, 2017/05/05 17:53:28]

Hmm. Maybe call this ChromeMaximumMilestone or ChromeMaxMilestone?

+  def testVersionBeforeDecorator(self):
+    self.fail('This function should not be called when the Chrome Milestone is '
+      'greater than 0')
+
+  @ChromeVersionAfterM(999999999)
+  def testVersionAfterDecorator(self):
+    self.fail('This function should not be called when the Chrome Milestone is '
+      'less than 999999999')
 
 if __name__ == '__main__':
   IntegrationTest.RunAllTests()