[WebViewLayoutTest] Disable two failing media stream api related tests.

android_webview/tools/system_webview_shell/layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTest.java

Index: android_webview/tools/system_webview_shell/layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTest.java
diff --git a/android_webview/tools/system_webview_shell/layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTest.java b/android_webview/tools/system_webview_shell/layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTest.java
index d96fefb133f2cb82f345c0d984543eab9d3d1b52..a7218502d06b5b5d427402276ae5a731eff3a559 100644
--- a/android_webview/tools/system_webview_shell/layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTest.java
+++ b/android_webview/tools/system_webview_shell/layout_tests/src/org/chromium/webview_shell/test/WebViewLayoutTest.java
@@ -231,12 +231,14 @@ public class WebViewLayoutTest
                 "blink-apis/geolocation/geolocation-permission-callbacks-expected.txt");
     }
 
+    @DisabledTest(message = "crbug.com/690536")
     @MediumTest
     public void testMediaStreamApiDenyPermission() throws Exception {
         runWebViewLayoutTest("blink-apis/webrtc/mediastream-permission-denied-callbacks.html",
                 "blink-apis/webrtc/mediastream-permission-denied-callbacks-expected.txt");
     }
 
+    @DisabledTest(message = "crbug.com/690536")
     @MediumTest
     public void testMediaStreamApi() throws Exception {
         mTestActivity.setGrantPermission(true);