NetworkService: Fix some browser tests that were using URLRequestMockHTTPJob::GetMockUrl

This CL fixes some browser tests by using test server instead of
URLRequestMockHTTPJob::GetMockUrl().

Bug: 776589
Change-Id: I6b84173cdbf5904393ea8bcd4d0c92729c873387
Reviewed-on: https://chromium-review.googlesource.com/755522
Commit-Queue: Jun Cai <[email protected]>
Reviewed-by: Matt Menke <[email protected]>
Reviewed-by: Yuzhu Shen <[email protected]>
Reviewed-by: Lei Zhang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#514578}
diff --git a/chrome/browser/lifetime/browser_close_manager_browsertest.cc b/chrome/browser/lifetime/browser_close_manager_browsertest.cc
index 4a03630..23b74551 100644
--- a/chrome/browser/lifetime/browser_close_manager_browsertest.cc
+++ b/chrome/browser/lifetime/browser_close_manager_browsertest.cc
@@ -1026,8 +1026,8 @@
   // Run a dangerous download, but the user doesn't make a decision.
   // This .swf normally would be categorized as DANGEROUS_FILE, but
   // TestDownloadManagerDelegate turns it into DANGEROUS_URL.
-  GURL download_url(net::URLRequestMockHTTPJob::GetMockUrl(
-      "downloads/dangerous/dangerous.swf"));
+  GURL download_url(
+      embedded_test_server()->GetURL("/downloads/dangerous/dangerous.swf"));
   content::DownloadTestObserverInterrupted observer(
       content::BrowserContext::GetDownloadManager(browser()->profile()),
       1,