Modify unit tests for NativeDesktopMediaList to cover aura window capture.

chrome/browser/media/native_desktop_media_list.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_NATIVE_DESKTOP_MEDIA_LIST_H_
 #define CHROME_BROWSER_MEDIA_NATIVE_DESKTOP_MEDIA_LIST_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 47 matching lines @@
 
 #if defined(USE_AURA)
   // previous_aura_thumbnail_hashes_ holds thumbanil hash values of aura windows
   // in the previous refresh. While new_aura_thumbnail_hashes_ has hash values
   // of the ongoing refresh. Those two maps are used to detect new thumbnails
   // and changed thumbnails from the previous refresh.
   ImageHashesMap previous_aura_thumbnail_hashes_;
   ImageHashesMap new_aura_thumbnail_hashes_;
 
   int pending_aura_capture_requests_ = 0;
-  bool pending_native_thumbnail_capture_ = true;
+  bool pending_native_thumbnail_capture_ = false;
 #endif
-
   base::WeakPtrFactory<NativeDesktopMediaList> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeDesktopMediaList);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_NATIVE_DESKTOP_MEDIA_LIST_H_