Disable PDFExtensionTestWithTestGuestViewManager.PdfInMainFrameHasFocus

Bug: 1126876
Change-Id: Ia6e0e9f30cdaef6b53a9c5b090c2cdac44dd8833
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2613524
Auto-Submit: Collin Baker <collinbaker@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840841}

chrome/browser/pdf/pdf_extension_test.cc

@@ -473,8 +473,10 @@ class PDFExtensionTestWithTestGuestViewManager
 // for https://crbug.com/536637. The original implementation checked that the
 // BrowserPlugin hosting the pdf extension was focused; in this re-write, we
 // make sure the guest view's WebContents has focus.
+//
+// Flaky: crbug.com/1126876
 IN_PROC_BROWSER_TEST_P(PDFExtensionTestWithTestGuestViewManager,
-                       PdfInMainFrameHasFocus) {
+                       DISABLED_PdfInMainFrameHasFocus) {
   // Load test HTML, and verify the text area has focus.
   GURL main_url(embedded_test_server()->GetURL("/pdf/test.pdf"));
   ui_test_utils::NavigateToURL(browser(), main_url);