Use correct http scheme in WebRtcApprtcBrowserTest.

Bug: 1141446
Change-Id: I93f6873b97cda1bf34b28fd4fefb6d55036eb215
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2492541Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Łukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819923}

chrome/browser/media/webrtc/webrtc_apprtc_browsertest.cc

@@ -143,7 +143,7 @@ class WebRtcApprtcBrowserTest : public WebRtcTestBase {
 
   bool LocalApprtcInstanceIsUp() {
     // Load the admin page and see if we manage to load it right.
-    ui_test_utils::NavigateToURL(browser(), GURL("localhost:9998"));
+    ui_test_utils::NavigateToURL(browser(), GURL("http://localhost:9998"));
     content::WebContents* tab_contents =
         browser()->tab_strip_model()->GetActiveWebContents();
     std::string javascript =