[Offline pages] Download UI: Adding Download Service Delegate for notifications

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
index 428353e83d7a558081c4c6901eb47668b6b202bb..c65c7907ca51865bb61ec0d4dbbb57ac9e9b6e55 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridge.java
@@ -7,6 +7,8 @@ package org.chromium.chrome.browser.offlinepages.downloads;
 import org.chromium.base.ObserverList;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.chrome.browser.download.DownloadItem;
+import org.chromium.chrome.browser.download.DownloadServiceDelegate;
 import org.chromium.chrome.browser.profiles.Profile;
 
 import java.util.ArrayList;
@@ -17,7 +19,7 @@ import java.util.List;
  * displayed in the downloads UI.
  */
 @JNINamespace("offline_pages::android")
-public class OfflinePageDownloadBridge {
+public class OfflinePageDownloadBridge implements DownloadServiceDelegate {
     /**
      * Base observer class for notifications on changes to the offline page related download items.
      */
@@ -53,6 +55,13 @@ public class OfflinePageDownloadBridge {
     private long mNativeOfflinePageDownloadBridge;
     private boolean mIsLoaded;
 
+    /**
+     * Gets DownloadServiceDelegate that is suitable for interacting with offline download items.
+     */
+    public static DownloadServiceDelegate getDownloadServiceDelegate() {
+        return new OfflinePageDownloadBridge(Profile.getLastUsedProfile());
+    }
+
     public OfflinePageDownloadBridge(Profile profile) {
         mNativeOfflinePageDownloadBridge = sIsTesting ? 0L : nativeInit(profile);
     }
@@ -102,6 +111,19 @@ public class OfflinePageDownloadBridge {
         return nativeGetItemByGuid(mNativeOfflinePageDownloadBridge, guid);
     }
 
+    @Override
+    public void cancelDownload(String downloadGuid, boolean isOffTheRecord,
+            boolean isNotificationDismissed) {
+    }
+
+    @Override
+    public void pauseDownload(String downloadGuid, boolean isOffTheRecord) {
+    }
+
+    @Override
+    public void resumeDownload(DownloadItem item, boolean hasUserGesture) {
+    }
+
     /**
      * Method to ensure that the bridge is created for tests without calling the native portion of
      * initialization.