New method in IndexesForest: remove(Account account). Use this method for cancelling downloads

src/com/owncloud/android/files/services/FileDownloader.java

@@ -671,22 +671,6 @@ public class FileDownloader extends Service implements OnDatatransferProgressLis
      */
     private void cancelDownloadsForAccount(Account account) {
         // Cancel pending downloads
-        ConcurrentMap downloadsAccount = mPendingDownloads.get(account);
-        Iterator<String> it = downloadsAccount.keySet().iterator();
-        Log_OC.d(TAG, "Number of pending downloads= " + downloadsAccount.size());
-        DownloadFileOperation download;
-        while (it.hasNext()) {
-            String key = it.next();
-            Log_OC.d(TAG, "download CANCELLED " + key);
-            if (key.startsWith(account.name)) {
-                synchronized (mPendingDownloads) {
-                    download = mPendingDownloads.get(key);
-                    if (download != null) {
-                        String remotePath = download.getRemotePath();
-                        mPendingDownloads.remove(account, remotePath);
-                    }
-                }
-            }
-        }
+        mPendingDownloads.remove(account);
     }
 }

src/com/owncloud/android/files/services/IndexedForest.java

@@ -213,17 +213,19 @@ public class IndexedForest<V> {
     }
 
 
-    public ConcurrentMap<String, Node<V>> get(Account account){
-        ConcurrentMap<String, Node<V>> accountMap = new ConcurrentHashMap<String, Node<V>>();
+    /**
+     * Remove the elements that contains account as a part of its key
+     * @param account
+     */
+    public void remove(Account account){
         Iterator<String> it = mMap.keySet().iterator();
         while (it.hasNext()) {
             String key = it.next();
             Log_OC.d("IndexedForest", "Number of pending downloads= "  + mMap.size());
             if (key.startsWith(account.name)) {
-                accountMap.putIfAbsent(key, mMap.get(key));
+                mMap.remove(key);
             }
         }
-        return accountMap;
     }
 
     /**