Mark some cronet instrumentation tests flaky.

components/cronet/android/sample/javatests/src/org/chromium/cronet_sample_apk/CronetSampleTest.java

Index: components/cronet/android/sample/javatests/src/org/chromium/cronet_sample_apk/CronetSampleTest.java
diff --git a/components/cronet/android/sample/javatests/src/org/chromium/cronet_sample_apk/CronetSampleTest.java b/components/cronet/android/sample/javatests/src/org/chromium/cronet_sample_apk/CronetSampleTest.java
index a686a5760cab7718c299b57297943a26b0492676..5719ecd071083a24ed0335ca735926371714523e 100644
--- a/components/cronet/android/sample/javatests/src/org/chromium/cronet_sample_apk/CronetSampleTest.java
+++ b/components/cronet/android/sample/javatests/src/org/chromium/cronet_sample_apk/CronetSampleTest.java
@@ -9,13 +9,11 @@
 import android.net.Uri;
 import android.os.ConditionVariable;
 import android.test.ActivityInstrumentationTestCase2;
-import android.test.suitebuilder.annotation.SmallTest;
+import android.test.FlakyTest;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.widget.TextView;
 
-import org.chromium.base.test.util.Feature;
-
 /**
  * Base test class for all CronetSample based tests.
  */
@@ -29,8 +27,12 @@ public CronetSampleTest() {
         super(CronetSampleActivity.class);
     }
 
+    /*
     @SmallTest
     @Feature({"Cronet"})
+    https://crbug.com/592444
+    */
+    @FlakyTest
     public void testLoadUrl() throws Exception {
         CronetSampleActivity activity = launchCronetSampleWithUrl(URL);