Initial implementation of Cronet Async API.

components/cronet/android/test/src/org/chromium/cronet_test_apk/MockUrlRequestJobUtil.java

Index: components/cronet/android/test/src/org/chromium/cronet_test_apk/MockUrlRequestJobUtil.java
diff --git a/components/cronet/android/test/src/org/chromium/cronet_test_apk/MockUrlRequestJobUtil.java b/components/cronet/android/test/src/org/chromium/cronet_test_apk/MockUrlRequestJobUtil.java
index fb10546d397ab93ef4ac20624af801f10525c361..0e26b266592554e49bc9d3199081e56ef2bcf39e 100644
--- a/components/cronet/android/test/src/org/chromium/cronet_test_apk/MockUrlRequestJobUtil.java
+++ b/components/cronet/android/test/src/org/chromium/cronet_test_apk/MockUrlRequestJobUtil.java
@@ -6,8 +6,17 @@ package org.chromium.cronet_test_apk;
 
 import org.chromium.base.JNINamespace;
 
+/**
+ * Test utils for MockUrlRequestJobs.
+ */
 @JNINamespace("cronet")
 public final class MockUrlRequestJobUtil {
+    enum FailurePhase {
+      START,
+      READ_ASYNC,
+      READ_SYNC,
+    };
+
     /**
      * Adds url interceptors for mock urls that are used in testing.
      */
@@ -15,5 +24,31 @@ public final class MockUrlRequestJobUtil {
         nativeAddUrlInterceptors();
     }
 
+    /**
+     * Constructs a mock URL.
+     *
+     * @param path path to a mock file.
+     */
+    public static String getMockUrl(String path) {
+        return nativeGetMockUrl(path);
+    }
+
+    /**
+     * Constructs a mock URL that hangs or fails at certain phase.
+     *
+     * @param path path to a mock file.
+     * @param phase at which request fails.
+     * @param netError reported by UrlRequestJob. Passing -1, results in hang.
+     */
+    public static String getMockUrlWithFailure(String path, FailurePhase phase,
+            int netError) {
+        return nativeGetMockUrlWithFailure(path, phase.ordinal(), netError);
+    }
+
     private static native void nativeAddUrlInterceptors();
+
+    private static native String nativeGetMockUrl(String path);
+
+    private static native String nativeGetMockUrlWithFailure(String path,
+            int phase, int netError);
 }