[Cronet] Enable persistence mode for Sdch

components/cronet/android/test/src/org/chromium/net/SdchTestUtil.java

+// Copyright 2015 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.os.ConditionVariable;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertNull;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+/**
+ * Wrapper class to start an in-process native test server, and get URLs
+ * needed to talk to it.
+ */
+@JNINamespace("cronet")
+public final class SdchTestUtil {
+    // Blocks until Sdch observer is added or removed.
+    private static final ConditionVariable sAddRemoveBlock = new ConditionVariable();
+
+    /**
+     * SdchObserver interface.
+     */
+    public static interface SdchObserver {
+        /**
+         * Called when a dictionary is added to the SdchManager.
+         * @param url the url of the dictionary added.
+         */
+        public void onDictionaryAdded(String url);
+    }
+
+    private static SdchObserver sObserver;
+
+    public static void addSdchObserver(
+            long contextAdapter, SdchObserver observer, boolean isLegacyAPI) {
+        assertNull(sObserver);
+        sObserver = observer;
+        nativeAddRemoveSdchObserver(contextAdapter, isLegacyAPI, true /** add */);
+        sAddRemoveBlock.block();
+        sAddRemoveBlock.close();
+    }
+
+    public static void removeSdchObserver(
+            long contextAdapter, SdchObserver observer, boolean isLegacyAPI) {
+        assertEquals(sObserver, observer);
+        sObserver = null;
+        nativeAddRemoveSdchObserver(contextAdapter, isLegacyAPI, false /** add */);
+        sAddRemoveBlock.block();
+        sAddRemoveBlock.close();
+    }
+
+    @CalledByNative
+    private static void onDictionaryAdded(String dictionaryURL) {
+        if (sObserver != null) {
+            sObserver.onDictionaryAdded(dictionaryURL);
+        }
+    }
+
+    @CalledByNative
+    private static void onAddRemoveSdchObserver() {
+        sAddRemoveBlock.open();
+    }
+
+    private static native void nativeAddRemoveSdchObserver(
+            long contextAdapter, boolean isLegacyAPI, boolean add);
+}