Mark some cronet instrumentation tests flaky.

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

Index: components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
diff --git a/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java b/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
index 9e0c8b465f86f06ab64900783f171cf8e96e90d2..ba3ffa32dd0572932ceaa3144e77ce77d0c3c721 100644
--- a/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
+++ b/components/cronet/android/test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java
@@ -11,6 +11,7 @@
 import android.os.ConditionVariable;
 import android.os.Handler;
 import android.os.Looper;
+import android.test.FlakyTest;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import org.chromium.base.PathUtils;
@@ -320,9 +321,13 @@ public void testRequestFinishedListener() throws Exception {
         mTestFramework.mCronetEngine.shutdown();
     }
 
+    /*
     @SmallTest
     @Feature({"Cronet"})
     @SuppressWarnings("deprecation")
+    https://crbug.com/592444
+    */
+    @FlakyTest
     public void testRequestFinishedListenerFailedRequest() throws Exception {
         String connectionRefusedUrl = "http://127.0.0.1:3";
         mTestFramework = startCronetTestFramework();
@@ -528,8 +533,12 @@ public void testMultipleShutdown() throws Exception {
         }
     }
 
+    /*
     @SmallTest
     @Feature({"Cronet"})
+    https://crbug.com/592444
+    */
+    @FlakyTest
     public void testShutdownAfterError() throws Exception {
         mTestFramework = startCronetTestFramework();
         TestUrlRequestCallback callback = new ShutdownTestUrlRequestCallback();