Android: Remove GetApplicationContext part 4

chrome/android/java/src/org/chromium/chrome/browser/ItemChooserDialog.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.chrome.browser;
 
 import android.app.Activity;
 import android.app.Dialog;
 import android.content.Context;
 import android.content.DialogInterface;
@@ skipping 527 matching lines @@
                 new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
                                               LinearLayout.LayoutParams.MATCH_PARENT));
         mDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
             @Override
             public void onDismiss(DialogInterface dialog) {
                 mItemSelectedCallback.onItemSelected("");
             }
         });
 
         Window window = mDialog.getWindow();
-        if (!DeviceFormFactor.isTablet(mActivity)) {
+        if (!DeviceFormFactor.isTablet()) {
             // On smaller screens, make the dialog fill the width of the screen,
             // and appear at the top.
             window.setBackgroundDrawable(new ColorDrawable(Color.WHITE));
             window.setGravity(Gravity.TOP);
             window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
                              ViewGroup.LayoutParams.WRAP_CONTENT);
         }
 
         mDialog.show();
     }
@@ skipping 122 matching lines @@
     }
 
     /**
      * Returns the ItemAdapter associated with this class. For use with tests only.
      */
     @VisibleForTesting
     public ItemAdapter getItemAdapterForTesting() {
         return mItemAdapter;
     }
 }