[Cronet] Respect user agent string from config

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

Index: components/cronet/android/test/javatests/src/org/chromium/net/HttpUrlRequestFactoryTest.java
diff --git a/components/cronet/android/test/javatests/src/org/chromium/net/HttpUrlRequestFactoryTest.java b/components/cronet/android/test/javatests/src/org/chromium/net/HttpUrlRequestFactoryTest.java
index b96c9395b95317048117ddb236db34f179c8e73d..565e65ea1cb988ed67e985c62e08caee35acc7f7 100644
--- a/components/cronet/android/test/javatests/src/org/chromium/net/HttpUrlRequestFactoryTest.java
+++ b/components/cronet/android/test/javatests/src/org/chromium/net/HttpUrlRequestFactoryTest.java
@@ -101,6 +101,29 @@ public class HttpUrlRequestFactoryTest extends CronetTestBase {
         fail("IllegalArgumentException must be thrown");
     }
 
+    @SmallTest
+    @Feature({"Cronet"})
+    public void testConfigUserAgent() throws Throwable {
+        HttpUrlRequestFactoryConfig config = new HttpUrlRequestFactoryConfig();
+        String userAgentName = "User-Agent";
+        String userAgentValue = "User-Agent-Value";
+        config.setUserAgent(userAgentValue);
+        config.setLibraryName("cronet_tests");
+        HttpUrlRequestFactory factory = HttpUrlRequestFactory.createFactory(
+                getInstrumentation().getTargetContext(), config);
+        assertTrue(NativeTestServer.startNativeTestServer(
+                getInstrumentation().getTargetContext()));
+        String url = NativeTestServer.getEchoHeaderURL(userAgentName);
+        TestHttpUrlRequestListener listener = new TestHttpUrlRequestListener();
+        HashMap<String, String> headers = new HashMap<String, String>();
+        HttpUrlRequest request = factory.createRequest(
+                url, 0, headers, listener);
+        request.start();
+        listener.blockForComplete();
+        assertEquals(userAgentValue, listener.mResponseAsString);
+        NativeTestServer.shutdownNativeTestServer();
+    }
+
     /**
      * Returns the path for the test storage (http cache, QUIC server info).
      */