[Sheriff] Disable VerifyEncryption browser test on CrOs.

Tbr: sdefresne@chromium.org
Bug: 910216
Change-Id: I6cdfe95d6c9202d14fc681fecded9ff2ce2bbdb2
Reviewed-on: https://chromium-review.googlesource.com/c/1355599Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612283}

chrome/browser/media/webrtc/webrtc_disable_encryption_flag_browsertest.cc

@@ -49,6 +49,12 @@ class WebRtcDisableEncryptionFlagBrowserTest : public WebRtcTestBase {
 };
 
 // Makes a call and checks that there's encryption or not in the SDP offer.
+// TODO(crbub.com/910216): De-flake this for ChromeOs.
+#if defined(OS_CHROMEOS)
+#define MAYBE_TestInMenuDrag DISABLED_VerifyEncryption
+#else
+#define MAYBE_TestInMenuDrag VerifyEncryption
+#endif
 IN_PROC_BROWSER_TEST_F(WebRtcDisableEncryptionFlagBrowserTest,
                        VerifyEncryption) {
   ASSERT_TRUE(embedded_test_server()->Start());