[WIP]Implement Blink side changes for navigator.language(s) support for workers.

Source/core/core.gypi

 {
     'includes': [
       'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/AnimationEffect.idl',
             'animation/AnimationPlayer.idl',
@@ skipping 1885 matching lines @@
             'workers/WorkerConsole.h',
             'workers/WorkerEventQueue.cpp',
             'workers/WorkerEventQueue.h',
             'workers/WorkerGlobalScope.cpp',
             'workers/WorkerGlobalScope.h',
             'workers/WorkerGlobalScopeProxy.h',
             'workers/WorkerGlobalScopeProxyProvider.cpp',
             'workers/WorkerGlobalScopeProxyProvider.h',
             'workers/WorkerInspectorProxy.cpp',
             'workers/WorkerInspectorProxy.h',
+            'workers/WorkerLanguageTasks.h',
+            'workers/WorkerLanguageTasks.cpp',
             'workers/WorkerLoaderProxy.h',
             'workers/WorkerLocation.h',
             'workers/WorkerMessagingProxy.cpp',
             'workers/WorkerMessagingProxy.h',
             'workers/WorkerNavigator.cpp',
             'workers/WorkerNavigator.h',
             'workers/WorkerObjectProxy.cpp',
             'workers/WorkerObjectProxy.h',
             'workers/WorkerReportingProxy.h',
             'workers/WorkerScriptLoader.cpp',
@@ skipping 1658 matching lines @@
             'rendering/shapes/BoxShapeTest.cpp',
             'rendering/style/OutlineValueTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }