[Cronet] Create Builders, rename UrlRequestContext to CronetEngine

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

Index: components/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java
diff --git a/components/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java b/components/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java
index 95200820ce3ea87e5861bc3f6cf53028d80731b0..d0be64e5b0fc5d557e66be72df1b9359f2be125c 100644
--- a/components/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java
+++ b/components/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java
@@ -22,15 +22,13 @@ public class ChromiumUrlRequestFactory extends HttpUrlRequestFactory {
     private ChromiumUrlRequestContext mRequestContext;
 
     @UsedByReflection("HttpUrlRequestFactory.java")
-    public ChromiumUrlRequestFactory(
-            Context context, UrlRequestContextConfig config) {
+    public ChromiumUrlRequestFactory(Context context, CronetEngine.Builder builder) {
         if (isEnabled()) {
-            String userAgent = config.userAgent();
+            String userAgent = builder.userAgent();
             if (userAgent.isEmpty()) {
                 userAgent = UserAgent.from(context);
             }
-            mRequestContext = new ChromiumUrlRequestContext(context,
-                    userAgent, config);
+            mRequestContext = new ChromiumUrlRequestContext(context, userAgent, builder);
         }
     }