Initial checkin of the Java OfflineContentProvider

components/offline_items_collection/core/android/java/src/org/chromium/components/offline_items_collection/OfflineContentProvider.java

Index: components/offline_items_collection/core/android/java/src/org/chromium/components/offline_items_collection/OfflineContentProvider.java
diff --git a/components/offline_items_collection/core/android/java/src/org/chromium/components/offline_items_collection/OfflineContentProvider.java b/components/offline_items_collection/core/android/java/src/org/chromium/components/offline_items_collection/OfflineContentProvider.java
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index 0000000000000000000000000000000000000000..7c177a7d4b014cf882a2005720ee3b434f0be93c
--- /dev/null
+++ b/components/offline_items_collection/core/android/java/src/org/chromium/components/offline_items_collection/OfflineContentProvider.java
@@ -0,0 +1,60 @@
+// Copyright 2017 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.components.offline_items_collection;
+
+import java.util.ArrayList;
+
+/**
+ * This interface is a Java counterpart to the C++ OfflineContentProvider
+ * (components/offline_items_collection/core/offline_content_provider.h) class.
+ */
+public interface OfflineContentProvider {
+    /** This interface is a Java counterpart to the C++ OfflineContentProvider::Observer
+     * (components/offline_items_collection/core/offline_content_provider.h) class.
+     */
+    interface Observer {
+        /** See OfflineContentProvider::Observer::OnItemsAvailable(...). */
+        void onItemsAvailable();
+
+        /** See OfflineContentProvider::Observer::OnItemsAdded(...). */
+        void onItemsAdded(ArrayList<OfflineItem> items);
+
+        /** See OfflineContentProvider::Observer::OnItemRemoved(...). */
+        void onItemRemoved(ContentId id);
+
+        /** See OfflineContentProvider::Observer::OnItemUpdated(...). */
+        void onItemUpdated(OfflineItem item);
+    }
+
+    /** See OfflineContentProvider::AreItemsAvailable(). */
+    boolean areItemsAvailable();
+
+    /** See OfflineContentProvider::OpenItem(...). */
+    void openItem(ContentId id);
+
+    /** See OfflineContentProvider::RemoveItem(...). */
+    void removeItem(ContentId id);
+
+    /** See OfflineContentProvider::CancelDownload(...). */
+    void cancelDownload(ContentId id);
+
+    /** See OfflineContentProvider::PauseDownload(...). */
+    void pauseDownload(ContentId id);
+
+    /** See OfflineContentProvider::ResumeDownload(...). */
+    void resumeDownload(ContentId id);
+
+    /** See OfflineContentProvider::GetItemById(...). */
+    OfflineItem getItemById(ContentId id);
+
+    /** See OfflineContentProvider::GetAllItems(). */
+    ArrayList<OfflineItem> getAllItems();
+
+    /** See OfflineContentProvider::AddObserver(...). */
+    void addObserver(Observer observer);
+
+    /** See OfflineContentProvider::RemoveObserver(...). */
+    void removeObserver(Observer observer);
+}