Android: Remove GetApplicationContext part 2

chrome/android/java/src/org/chromium/chrome/browser/ChromeBackupAgent.java

 // Copyright 2016 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.chrome.browser;
 
 import android.app.backup.BackupAgent;
 import android.app.backup.BackupDataInput;
 import android.app.backup.BackupDataOutput;
 import android.content.Context;
@@ skipping 120 matching lines @@
         public void save(ParcelFileDescriptor parceledState) throws IOException {
             FileOutputStream outstream = new FileOutputStream(parceledState.getFileDescriptor());
             ObjectOutputStream out = new ObjectOutputStream(outstream);
             out.writeObject(mNames);
             out.writeObject(mValues);
         }
     }
 
     @VisibleForTesting
     protected boolean accountExistsOnDevice(String userName) {
-        return AccountManagerHelper.get(this).getAccountFromName(userName) != null;
+        return AccountManagerHelper.get().getAccountFromName(userName) != null;
     }
 
     @VisibleForTesting
     protected boolean initializeBrowser(Context context) {
         try {
             ChromeBrowserInitializer.getInstance(context).handleSynchronousStartup();
         } catch (ProcessInitException e) {
             Log.w(TAG, "Browser launch failed on backup or restore: " + e);
             return false;
         }
@@ skipping 275 matching lines @@
 
     @VisibleForTesting
     protected native String[] nativeGetBoolBackupNames();
 
     @VisibleForTesting
     protected native boolean[] nativeGetBoolBackupValues();
 
     @VisibleForTesting
     protected native void nativeSetBoolBackupPrefs(String[] name, boolean[] value);
 }