Fix testRangeRequest test by navigating to a different URL

The earlier URL /connect is navigated internally by the data saver
secure proxy checker. This could lead to confusion w.r.t. such
bfcache features that could return the cached response instead. So
navigating to a different URL.

Fixed: 1019976
Change-Id: I6450c1f48c6b8c9f089261f9d1693218240ddd3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1903929Reviewed-by: Robert Ogden <robertogden@chromium.org>
Commit-Queue: rajendrant <rajendrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713611}

tools/chrome_proxy/webdriver/video.py

@@ -74,7 +74,7 @@ class Video(IntegrationTest):
   def testRangeRequest(self):
     with TestDriver() as t:
       t.AddChromeArg('--enable-spdy-proxy-auth')
-      t.LoadURL('http://check.googlezip.net/connect')
+      t.LoadURL('http://check.googlezip.net/report')
       time.sleep(2) # wait for page load
       t.ExecuteJavascript(
         'var xhr = new XMLHttpRequest();'