Disabling flaky TranslateManagerBrowserTest.TranslateIframeNotTranslated

TBR=dougarnett@chromium.org

Bug: 1075446, 797328
Change-Id: If68a0f22b50a6dd848db6cce5b2442e4639f8a28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2166105Reviewed-by: Alexander Hendrich <hendrich@chromium.org>
Commit-Queue: Alexander Hendrich <hendrich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762745}

chrome/browser/translate/translate_manager_browsertest.cc

@@ -1152,8 +1152,9 @@ IN_PROC_BROWSER_TEST_F(TranslateManagerBrowserTest,
 }
 
 // Test that iframes not translated.
+// TODO(https://crbug.com/1075446) disabled due to flakiness
 IN_PROC_BROWSER_TEST_F(TranslateManagerBrowserTest,
-                       TranslateIframeNotTranslated) {
+                       DISABLED_TranslateIframeNotTranslated) {
   SetTranslateScript(kTestValidScript);
 
   ChromeTranslateClient* chrome_translate_client = GetChromeTranslateClient();