Initial implementation of Cronet Async API.

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

Index: components/cronet/android/java/src/org/chromium/net/UrlRequest.java
diff --git a/components/cronet/android/java/src/org/chromium/net/UrlRequest.java b/components/cronet/android/java/src/org/chromium/net/UrlRequest.java
index 57a0b439101592235c74d522962acc76dd9dba37..8df71266f519361a9597ba21500bd8f89d763a32 100644
--- a/components/cronet/android/java/src/org/chromium/net/UrlRequest.java
+++ b/components/cronet/android/java/src/org/chromium/net/UrlRequest.java
@@ -9,6 +9,16 @@ package org.chromium.net;
  * Note:  All methods must be called on the Executor passed in during creation.
  */
 public interface UrlRequest {
+    public static final int REQUEST_PRIORITY_IDLE = 0;
+
+    public static final int REQUEST_PRIORITY_LOWEST = 1;
+
+    public static final int REQUEST_PRIORITY_LOW = 2;
+
+    public static final int REQUEST_PRIORITY_MEDIUM = 3;
+
+    public static final int REQUEST_PRIORITY_HIGHEST = 4;
+
     /**
      * More setters go here.  They may only be called before start (Maybe
      * also allow during redirects).  Could optionally instead use arguments
@@ -35,9 +45,8 @@ public interface UrlRequest {
 
     /**
      * Starts the request, all callbacks go to listener.
-     * @param listener
      */
-    public void start(UrlRequestListener listener);
+    public void start();
 
     /**
      * Can be called at any time.