Disable flaky PrerenderBrowserTest.PrerenderInfiniteLoop.

During the navigation in the test, a renderer is loading a page and
if it completes in time, sends a AddLinkRelPrerender IPC to the browser
to start a link prerenderer.

If this occurs before the navigation started by the test completes, then
the test will fail with the wrong number of prerenderers.

This seems to imply the test is exiting too quickly, and not observing
the actual number of prerenderers that we create.

TBR=droger@chromium.org
NOTRY=true

Change-Id: If74bf60f45b60f52041167532eca9915c6d604b3
Bug: 903695
Reviewed-on: https://chromium-review.googlesource.com/c/1330287Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606975}

chrome/browser/prerender/prerender_browsertest.cc

@@ -1692,7 +1692,8 @@ IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderQuickQuit) {
 }
 
 // Checks that we don't prerender in an infinite loop.
-IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderInfiniteLoop) {
+// TODO(crbug.com/903695): This test is flaky.
+IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_PrerenderInfiniteLoop) {
   const char* const kHtmlFileA = "/prerender/prerender_infinite_a.html";
   const char* const kHtmlFileB = "/prerender/prerender_infinite_b.html";