NetworkService: Fix NewTabPageInterceptorTest.NoInterception by using https test server

This CL fixes the NewTabPageInterceptorTest.NoInterception browser test
for network service by using https embedded test server instead of
URLRequestMockHTTPJob::GetMockHttpsUrl().

Bug: 776589
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I4d1f911ec4db21a2f086c09d3d6a99e41ad75230
Reviewed-on: https://chromium-review.googlesource.com/802079Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Jun Cai <juncai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521751}

chrome/browser/ui/search/new_tab_page_interceptor_browsertest.cc

@@ -19,6 +19,7 @@
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
+#include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/url_request/url_request_mock_http_job.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
@@ -55,8 +56,10 @@ class NewTabPageInterceptorTest : public InProcessBrowserTest {
 };
 
 IN_PROC_BROWSER_TEST_F(NewTabPageInterceptorTest, NoInterception) {
-  GURL new_tab_url =
-      net::URLRequestMockHTTPJob::GetMockHttpsUrl("instant_extended.html");
+  net::EmbeddedTestServer https_test_server(
+      net::EmbeddedTestServer::TYPE_HTTPS);
+  ASSERT_TRUE(https_test_server.Start());
+  GURL new_tab_url = https_test_server.GetURL("/instant_extended.html");
   ChangeDefaultSearchProvider("instant_extended.html");
 
   ui_test_utils::NavigateToURL(browser(), new_tab_url);

testing/buildbot/filters/mojo.fyi.network_browser_tests.filter

@@ -689,7 +689,6 @@
 -NewTabPageInterceptorTest.204Interception
 -NewTabPageInterceptorTest.404Interception
 -NewTabPageInterceptorTest.FailedRequestInterception
--NewTabPageInterceptorTest.NoInterception
 
 # This requires that InterceptNetworkTransactions works
 -ErrorPageNavigationCorrectionsFailTest.StaleCacheStatusFailedCorrections