Disable MimeHandlerViewCrossProcessTest.EmbeddedThenPrint/0 for flakiness

Tbr: wjmaclean@chromium.org
Bug: 1020313
Change-Id: I6acb083812d8d5c91bba57bc7b4fc367798c2624
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1894256Reviewed-by: Kevin McNee <mcnee@chromium.org>
Commit-Queue: Kevin McNee <mcnee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711424}

extensions/browser/guest_view/mime_handler_view/mime_handler_view_browsertest.cc

@@ -255,6 +255,11 @@ class PrintPreviewWaiter : public content::BrowserMessageFilter {
 };
 
 IN_PROC_BROWSER_TEST_P(MimeHandlerViewCrossProcessTest, EmbeddedThenPrint) {
+  // TODO(1020313): The /0 version of this test is flaky.
+  if (!is_cross_process_mode()) {
+    return;
+  }
+
   RunTest("test_embedded.html");
   ui_test_utils::NavigateToURL(browser(), GURL(url::kAboutBlankURL));
   auto* gv_manager = GetGuestViewManager();