Cronet Java wrappers to fallback to HttpUrlConnection if Cronet is not available.

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

Index: net/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java
diff --git a/net/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java b/net/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java
new file mode 100644
index 0000000000000000000000000000000000000000..0b0e9c269a094adc0be9373a31a70f3661ae6fff
--- /dev/null
+++ b/net/cronet/android/java/src/org/chromium/net/ChromiumUrlRequestFactory.java
@@ -0,0 +1,52 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.net;
+
+import android.content.Context;
+import android.os.Build;
+
+import java.nio.channels.WritableByteChannel;
+import java.util.Map;
+
+/**
+ * Network request factory using the native http stack implementation.
+ */
+@UsedByReflection("HttpUrlRequestFactory.java")
+class ChromiumUrlRequestFactory extends HttpUrlRequestFactory {
+    private static ChromiumUrlRequestContext sRequestContext;
+
+    @UsedByReflection("HttpUrlRequestFactory.java")
+    public ChromiumUrlRequestFactory(Context context) {
+        if (sRequestContext == null && isEnabled()) {
+            System.loadLibrary("cronet");
+            sRequestContext = ChromiumUrlRequestContext.getInstance(context);
+        }
+    }
+
+    @Override
+    protected boolean isEnabled() {
+        return Build.VERSION.SDK_INT >= 14;
+    }
+
+    @Override
+    protected String getName() {
+        return "Chromium/" + UrlRequestContext.getVersion();
+    }
+
+    @Override
+    protected HttpUrlRequest createRequest(String url, int requestPriority,
+            Map<String, String> headers, HttpUrlRequestListener listener) {
+        return new ChromiumUrlRequest(sRequestContext, url, requestPriority,
+                headers, listener);
+    }
+
+    @Override
+    protected HttpUrlRequest createRequest(String url, int requestPriority,
+            Map<String, String> headers, WritableByteChannel channel,
+            HttpUrlRequestListener listener) {
+        return new ChromiumUrlRequest(sRequestContext, url, requestPriority,
+                headers, channel, listener);
+    }
+}