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 6c59ae18da42b31e8bf50bed595c41bcd85e309e..4883f9984263b17a1a5ca748af39965079fe70bb 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.
      */
@@ -125,7 +136,7 @@ public class HttpUrlRequestFactoryConfig {
             hint.put(UrlRequestContextConfig.QUIC_HINT_ALT_PORT, alternatePort);
             quicHints.put(hint);
         } catch (JSONException e) {
-            ;
+            // Ignore the exception.
         }
         return this;
     }
@@ -145,7 +156,7 @@ public class HttpUrlRequestFactoryConfig {
         try {
             mConfig.put(key, value);
         } catch (JSONException e) {
-            ;
+            // Ignore the exception.
         }
         return this;
     }
@@ -158,7 +169,7 @@ public class HttpUrlRequestFactoryConfig {
         try {
             mConfig.put(key, value);
         } catch (JSONException e) {
-            ;
+            // Ignore the exception.
         }
         return this;
     }
@@ -171,7 +182,7 @@ public class HttpUrlRequestFactoryConfig {
         try {
             mConfig.put(key, value);
         } catch (JSONException e) {
-            ;
+            // Ignore the exception.
         }
         return this;
     }