Disable two more flaky WebContentsTests

content/public/android/javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java

Index: content/public/android/javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java
diff --git a/content/public/android/javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java b/content/public/android/javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java
index dcbc8578f8ff777ab3fe7b709d0548af5ca48775..eabf0e9a037b37b8351d9863ada221a09c60f47f 100644
--- a/content/public/android/javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java
+++ b/content/public/android/javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java
@@ -199,7 +199,11 @@ public class WebContentsTest extends ContentShellTestBase {
      * @throws InterruptedException
      * @throws ExecutionException
      */
+    /*
     @SmallTest
+    https://crbug.com/538625
+    */
+    @DisabledTest
     public void testSerializingADestroyedWebContentsDoesNotDeserialize()
             throws InterruptedException, ExecutionException {
         ContentShellActivity activity = launchContentShellWithUrl(TEST_URL_1);
@@ -234,7 +238,11 @@ public class WebContentsTest extends ContentShellTestBase {
      * @throws InterruptedException
      * @throws ExecutionException
      */
+    /*
     @SmallTest
+    https://crbug.com/538625
+    */
+    @DisabledTest
     public void testDestroyingAWebContentsAfterSerializingDoesNotDeserialize()
             throws InterruptedException, ExecutionException {
         ContentShellActivity activity = launchContentShellWithUrl(TEST_URL_1);