Merge "Add helper trait for deprecating properties"

diff --combined autoload.php
index 2ed9ff3,ac34efb..4018b3c
--- 1/autoload.php
--- 2/autoload.php
+++ b/autoload.php
@@@ -387,6 -387,7 +387,7 @@@ $wgAutoloadLocalClasses = 
        'DependencyWrapper' => __DIR__ . '/includes/cache/CacheDependency.php',
        'DeprecatedGlobal' => __DIR__ . '/includes/DeprecatedGlobal.php',
        'DeprecatedInterfaceFinder' => __DIR__ . '/maintenance/findDeprecated.php',
+       'DeprecationHelper' => __DIR__ . '/includes/debug/DeprecationHelper.php',
        'DerivativeContext' => __DIR__ . '/includes/context/DerivativeContext.php',
        'DerivativeRequest' => __DIR__ . '/includes/DerivativeRequest.php',
        'DerivativeResourceLoaderContext' => __DIR__ . '/includes/resourceloader/DerivativeResourceLoaderContext.php',
@@@ -703,6 -704,7 +704,6 @@@
        'JobQueueMemory' => __DIR__ . '/includes/jobqueue/JobQueueMemory.php',
        'JobQueueReadOnlyError' => __DIR__ . '/includes/jobqueue/JobQueue.php',
        'JobQueueRedis' => __DIR__ . '/includes/jobqueue/JobQueueRedis.php',
 -      'JobQueueSecondTestQueue' => __DIR__ . '/includes/jobqueue/JobQueueSecondTestQueue.php',
        'JobRunner' => __DIR__ . '/includes/jobqueue/JobRunner.php',
        'JobSpecification' => __DIR__ . '/includes/jobqueue/JobSpecification.php',
        'JpegHandler' => __DIR__ . '/includes/media/JpegHandler.php',
@@@ -888,7 -890,6 +889,7 @@@
        'MediaWiki\\Auth\\Throttler' => __DIR__ . '/includes/auth/Throttler.php',
        'MediaWiki\\Auth\\UserDataAuthenticationRequest' => __DIR__ . '/includes/auth/UserDataAuthenticationRequest.php',
        'MediaWiki\\Auth\\UsernameAuthenticationRequest' => __DIR__ . '/includes/auth/UsernameAuthenticationRequest.php',
 +      'MediaWiki\\Config\\ConfigRepository' => __DIR__ . '/includes/config/ConfigRepository.php',
        'MediaWiki\\DB\\PatchFileLocation' => __DIR__ . '/includes/db/PatchFileLocation.php',
        'MediaWiki\\Diff\\ComplexityException' => __DIR__ . '/includes/diff/ComplexityException.php',
        'MediaWiki\\Diff\\WordAccumulator' => __DIR__ . '/includes/diff/WordAccumulator.php',
@@@ -1211,7 -1212,6 +1212,7 @@@
        'ReplicatedBagOStuff' => __DIR__ . '/includes/libs/objectcache/ReplicatedBagOStuff.php',
        'RepoGroup' => __DIR__ . '/includes/filerepo/RepoGroup.php',
        'RequestContext' => __DIR__ . '/includes/context/RequestContext.php',
 +      'ResetAuthenticationThrottle' => __DIR__ . '/maintenance/resetAuthenticationThrottle.php',
        'ResetUserEmail' => __DIR__ . '/maintenance/resetUserEmail.php',
        'ResetUserTokens' => __DIR__ . '/maintenance/resetUserTokens.php',
        'ResourceFileCache' => __DIR__ . '/includes/cache/ResourceFileCache.php',