Mark some cronet instrumentation tests flaky.

components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestTest.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.net;
 
 import android.os.ConditionVariable;
+import android.test.FlakyTest;
 import android.test.MoreAsserts;
 import android.test.suitebuilder.annotation.SmallTest;
 import android.util.Log;
 
 import org.chromium.base.test.util.Feature;
 import org.chromium.net.TestUrlRequestCallback.FailureType;
 import org.chromium.net.TestUrlRequestCallback.ResponseStep;
 import org.chromium.net.test.FailurePhase;
 
 import java.net.ConnectException;
@@ skipping 1423 matching lines @@
         assertTrue(urlRequest.isDone());
         assertEquals(expectResponseInfo, callback.mResponseInfo != null);
         assertEquals(expectError, callback.mError != null);
         assertEquals(expectError, callback.mOnErrorCalled);
         assertEquals(failureType == FailureType.CANCEL_SYNC
                         || failureType == FailureType.CANCEL_ASYNC
                         || failureType == FailureType.CANCEL_ASYNC_WITHOUT_PAUSE,
                 callback.mOnCanceledCalled);
     }
 
+    /*
     @SmallTest
     @Feature({"Cronet"})
+    https://crbug.com/592444
+    */
+    @FlakyTest
     public void testFailures() throws Exception {
         throwOrCancel(FailureType.CANCEL_SYNC, ResponseStep.ON_RECEIVED_REDIRECT,
                 false, false);
         throwOrCancel(FailureType.CANCEL_ASYNC, ResponseStep.ON_RECEIVED_REDIRECT,
                 false, false);
         throwOrCancel(FailureType.CANCEL_ASYNC_WITHOUT_PAUSE, ResponseStep.ON_RECEIVED_REDIRECT,
                 false, false);
         throwOrCancel(FailureType.THROW_SYNC, ResponseStep.ON_RECEIVED_REDIRECT,
                 false, true);
 
@@ skipping 209 matching lines @@
     private String bufferContentsToString(ByteBuffer byteBuffer, int start, int end) {
         // Use a duplicate to avoid modifying byteBuffer.
         ByteBuffer duplicate = byteBuffer.duplicate();
         duplicate.position(start);
         duplicate.limit(end);
         byte[] contents = new byte[duplicate.remaining()];
         duplicate.get(contents);
         return new String(contents);
     }
 }