Adds lite page integration test (ignoring country blacklist).

tools/chrome_proxy/webdriver/lofi.py

Index: tools/chrome_proxy/webdriver/lofi.py
diff --git a/tools/chrome_proxy/webdriver/lofi.py b/tools/chrome_proxy/webdriver/lofi.py
index ac1198ad811f6e525dde35d47fa4238ece2fb397..5325ab95de583412b01591dde6ec2f865cc703f6 100644
--- a/tools/chrome_proxy/webdriver/lofi.py
+++ b/tools/chrome_proxy/webdriver/lofi.py
@@ -6,7 +6,7 @@ import common
 from common import TestDriver
 from common import IntegrationTest
 from decorators import ChromeVersionBeforeM
-
+from decorators import ChromeVersionEqualOrAfterM
 
 class LoFi(IntegrationTest):
 
@@ -185,6 +185,7 @@ class LoFi(IntegrationTest):
 
   # Checks that LoFi images are served and the force empty image experiment
   # directive is provided when LoFi is always-on without Lite Pages enabled.
+  @ChromeVersionEqualOrAfterM(61)
   def testLoFiForcedExperiment(self):
     # If it was attempted to run with another experiment, skip this test.
     if common.ParseFlags().browser_args and ('--data-reduction-proxy-experiment'
@@ -193,6 +194,15 @@ class LoFi(IntegrationTest):
     with TestDriver() as test_driver:
       test_driver.AddChromeArg('--enable-spdy-proxy-auth')
       test_driver.AddChromeArg('--data-reduction-proxy-lo-fi=always-on')
+      test_driver.AddChromeArg('--enable-features='
+                               'DataReductionProxyDecidesTransform')
+
+      # Ensure fast network (4G) to ensure force flag ignores ECT.
+      test_driver.AddChromeArg('--force-fieldtrial-params='
+                               'NetworkQualityEstimator.Enabled:'
+                               'force_effective_connection_type/4G')
+      test_driver.AddChromeArg('--force-fieldtrials=NetworkQualityEstimator/'
+                               'Enabled')
 
       test_driver.LoadURL('http://check.googlezip.net/static/index.html')
 
@@ -201,10 +211,12 @@ class LoFi(IntegrationTest):
         self.assertIn('exp=force_page_policies_empty_image',
           response.request_headers['chrome-proxy'])
         if response.url.endswith('html'):
-          # TODO(dougarnett): Check page-policies response when server supports
+          # Verify that the server provides the fallback directive
+          self.assertIn('chrome-proxy', response.response_headers)
+          self.assertIn('page-policies=empty-image',
+                        response.response_headers['chrome-proxy'])
           continue
         if response.url.endswith('png'):
-          # TODO(dougarnett): Set 4G ECT when server supports force empty image
           self.checkLoFiResponse(response, True)
           lofi_responses = lofi_responses + 1
 
@@ -213,6 +225,7 @@ class LoFi(IntegrationTest):
 
   # Checks that Client LoFi resource requests have the Intervention header
   # (in case page has https images that may not be fully loaded).
+  @ChromeVersionEqualOrAfterM(61)
   def testClientLoFiInterventionHeader(self):
     with TestDriver() as test_driver:
       test_driver.AddChromeArg('--enable-spdy-proxy-auth')