[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.assertNull;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+/**
+ * Test utilities related to Sdch.
+ */
+@JNINamespace("cronet")
+public final class SdchTestUtil {
+    // Blocks until the native SdchObserver is added.
+    private static final ConditionVariable sAddBlock = new ConditionVariable();
+
+    /**
+     * Abstract class to listen for callbacks of the native SdchObserver.
+     */
+    public abstract static class SdchObserverCallback {
+        /**
+         * Called when a dictionary is added to the SdchManager.
+         * @param url the url of the dictionary added.
+         */
+        public abstract void onDictionaryAdded(String url);
+    }
+
+    private static SdchObserverCallback sCallback;
+    private static boolean sRegisterSdchObserverSucceeded = false;
+
+    /**
+     * Returns whether the native SdchObserver has been registered. The native
+     * SdchObserver will not be registered when dictionaries for the
+     * {@code targetUrl} are already loaded, for example.
+     */
+    public static boolean registerSdchObserverCallback(String targetUrl, long contextAdapter,
+            SdchObserverCallback callback, boolean isLegacyAPI) {
+        assertNull(sCallback);
+        sCallback = callback;
+        nativeAddSdchObserver(targetUrl, contextAdapter, isLegacyAPI);
+        sAddBlock.block();
+        sAddBlock.close();
+        return sRegisterSdchObserverSucceeded;
+    }
+
+    @CalledByNative
+    private static void onDictionaryAdded(String dictionaryURL) {
+        if (sCallback != null) {
+            sCallback.onDictionaryAdded(dictionaryURL);
+            sCallback = null;
+        }
+    }
+
+    @CalledByNative
+    private static void onAddSdchObserverCompleted(boolean succeeded) {
+        sRegisterSdchObserverSucceeded = succeeded;
+        sAddBlock.open();
+    }
+
+    private static native void nativeAddSdchObserver(
+            String targetUrl, long contextAdapter, boolean isLegacyAPI);
+}