Initial implementation of Cronet Async API.

components/cronet/android/java/src/org/chromium/net/HttpUrlRequestFactoryConfig.java

Index: components/cronet/android/java/src/org/chromium/net/HttpUrlRequestFactoryConfig.java
diff --git a/components/cronet/android/java/src/org/chromium/net/HttpUrlRequestFactoryConfig.java b/components/cronet/android/java/src/org/chromium/net/HttpUrlRequestFactoryConfig.java
index 39c737aed740aa778f217bbb7b1cb2f3a82228d2..aa6bc9433f858a86efdfbfae17196f31adff3101 100644
--- a/components/cronet/android/java/src/org/chromium/net/HttpUrlRequestFactoryConfig.java
+++ b/components/cronet/android/java/src/org/chromium/net/HttpUrlRequestFactoryConfig.java
@@ -25,13 +25,6 @@ public class HttpUrlRequestFactoryConfig {
     }
 
     /**
-     * Override the name of the native library backing cronet.
-     */
-    public HttpUrlRequestFactoryConfig setLibraryName(String libName) {
-        return putString(UrlRequestContextConfig.NATIVE_LIBRARY_NAME, libName);
-    }
-
-    /**
      * Create config from json serialized using @toString.
      */
     public HttpUrlRequestFactoryConfig(String json) throws JSONException {
@@ -50,6 +43,24 @@ public class HttpUrlRequestFactoryConfig {
         return mConfig.optBoolean(UrlRequestContextConfig.ENABLE_LEGACY_MODE);
     }
 
+   /**
+     * Override the user-agent header for all requests.
+     */
+    public HttpUrlRequestFactoryConfig setUserAgent(String userAgent) {
+        return putString(UrlRequestContextConfig.USER_AGENT, userAgent);
+    }
+
+    String userAgent() {
+        return mConfig.optString(UrlRequestContextConfig.USER_AGENT);
+    }
+
+    /**
+     * Override the name of the native library backing cronet.
+     */
+    public HttpUrlRequestFactoryConfig setLibraryName(String libName) {
+        return putString(UrlRequestContextConfig.NATIVE_LIBRARY_NAME, libName);
+    }
+
     /**
      * Boolean, enable QUIC if true.
      */