Revert of Fix CronetHttpURLConnectionTest#testServerHangsUp flake

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

Index: components/cronet/android/test/javatests/src/org/chromium/net/urlconnection/CronetHttpURLConnectionTest.java
diff --git a/components/cronet/android/test/javatests/src/org/chromium/net/urlconnection/CronetHttpURLConnectionTest.java b/components/cronet/android/test/javatests/src/org/chromium/net/urlconnection/CronetHttpURLConnectionTest.java
index 6dfaa2aa9341130647d5442998cd4c1faaa6aaf2..bc8ef9873c3d469884bf32c6cd2cc343154c5dc0 100644
--- a/components/cronet/android/test/javatests/src/org/chromium/net/urlconnection/CronetHttpURLConnectionTest.java
+++ b/components/cronet/android/test/javatests/src/org/chromium/net/urlconnection/CronetHttpURLConnectionTest.java
@@ -846,8 +846,17 @@
     @Feature({"Cronet"})
     @CompareDefaultWithCronet
     public void testServerHangsUp() throws Exception {
-        URL url = new URL(NativeTestServer.getExabyteResponseURL());
+        URL url = new URL(NativeTestServer.getEchoBodyURL());
         final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+        // Make the server echo a large request body, so it exceeds the internal
+        // read buffer.
+        connection.setDoOutput(true);
+        connection.setRequestMethod("POST");
+        byte[] largeData = TestUtil.getLargeData();
+        connection.setFixedLengthStreamingMode(largeData.length);
+        OutputStream out = connection.getOutputStream();
+        out.write(largeData);
+
         InputStream in = connection.getInputStream();
         // Read one byte and shut down the server.
         assertTrue(in.read() != 1);