Flip proprietary codecs to false for Android chromium builds.

chrome/android/javatests/src/org/chromium/chrome/browser/contextmenu/ContextMenuTest.java

 // Copyright 2013 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.contextmenu;
 
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Context;
 import android.os.Environment;
@@ skipping 218 matching lines @@
         saveMediaFromContextMenu("testImage", R.id.contextmenu_save_image, "test_image.png");
     }
 
     @LargeTest
     @Feature({"Browser"})
     @DisableIf.Build(sdk_is_greater_than = 22, message = "crbug.com/592594")
     public void testSaveVideo()
             throws InterruptedException, TimeoutException, SecurityException, IOException {
         // Click the video to enable playback
         DOMUtils.clickNode(this, getActivity().getCurrentContentViewCore(), "videoDOMElement");
-        saveMediaFromContextMenu("videoDOMElement", R.id.contextmenu_save_video, "test.mp4");
+        saveMediaFromContextMenu("videoDOMElement", R.id.contextmenu_save_video, "test.webm");
     }
 
     /**
      * Opens a link and image in new tabs and verifies the order of the tabs. Also verifies that
      * the parent page remains in front after opening links in new tabs.
      *
      * This test only applies in tabbed mode. In document mode, Android handles the ordering of the
      * tabs.
      */
     @LargeTest
@@ skipping 62 matching lines @@
         assertNotNull("Primary clip is null", clipData);
         assertTrue("Primary clip contains no items.", clipData.getItemCount() > 0);
         return clipData.getItemAt(0).getText().toString();
     }
 
     private void assertStringContains(String subString, String superString) {
         assertTrue("String '" + superString + "' does not contain '" + subString + "'",
                 superString.contains(subString));
     }
 }