Simplify SharedWorkerRepository code

Source/core/core.gypi

 {
     'variables': {
         'core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSKeyframeRule.idl',
@@ skipping 1265 matching lines @@
             'timing/PerformanceTiming.h',
             'timing/PerformanceUserTiming.cpp',
             'timing/PerformanceUserTiming.h',
             'page/PointerLockController.cpp',
             'page/PointerLockController.h',
             'page/PopupOpeningObserver.h',
             'page/PrintContext.cpp',
             'timing/ResourceTimingInfo.h',
             'page/RuntimeCSSEnabled.cpp',
             'page/RuntimeCSSEnabled.h',
-            'page/RuntimeEnabledFeaturesCustom.cpp',
             'frame/Screen.cpp',
             'frame/Screen.h',
             'page/Settings.cpp',
             'page/SpatialNavigation.cpp',
             'frame/SuspendableTimer.cpp',
             'frame/SuspendableTimer.h',
             'page/TouchAdjustment.cpp',
             'page/TouchAdjustment.h',
             'page/TouchDisambiguation.cpp',
             'page/TouchDisambiguation.h',
@@ skipping 378 matching lines @@
             'workers/AbstractWorker.cpp',
             'workers/AbstractWorker.h',
             'workers/DedicatedWorkerGlobalScope.cpp',
             'workers/DedicatedWorkerGlobalScope.h',
             'workers/DedicatedWorkerThread.cpp',
             'workers/DedicatedWorkerThread.h',
             'workers/SharedWorker.cpp',
             'workers/SharedWorker.h',
             'workers/SharedWorkerGlobalScope.cpp',
             'workers/SharedWorkerGlobalScope.h',
-            'workers/SharedWorkerRepository.h',
+            'workers/SharedWorkerRepositoryClient.h',
             'workers/SharedWorkerThread.cpp',
             'workers/SharedWorkerThread.h',
             'workers/Worker.cpp',
             'workers/Worker.h',
             'workers/WorkerClients.h',
             'workers/WorkerConsole.cpp',
             'workers/WorkerConsole.h',
             'workers/WorkerEventQueue.cpp',
             'workers/WorkerEventQueue.h',
             'workers/WorkerGlobalScopeProxy.cpp',
@@ skipping 1929 matching lines @@
                 'bison_exe': 'bison',
                 # We specify a preprocess so it happens locally and won't get
                 # distributed to goma.
                 # FIXME: /usr/bin/gcc won't exist on OSX forever. We want to
                 # use /usr/bin/clang once we require Xcode 4.x.
                 'preprocessor': '--preprocessor "/usr/bin/gcc -E -P -x c++"'
               }],
          ],
     }
 }