Revert of Pass per-frame task runners to Workers (when possible)

third_party/WebKit/Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 2246 matching lines @@
             'workers/DedicatedWorkerThread.h',
             'workers/InProcessWorkerBase.cpp',
             'workers/InProcessWorkerBase.h',
             'workers/InProcessWorkerGlobalScopeProxy.h',
             'workers/InProcessWorkerMessagingProxy.cpp',
             'workers/InProcessWorkerMessagingProxy.h',
             'workers/InProcessWorkerObjectProxy.cpp',
             'workers/InProcessWorkerObjectProxy.h',
             'workers/MainThreadWorkletGlobalScope.cpp',
             'workers/MainThreadWorkletGlobalScope.h',
-            'workers/ParentFrameTaskRunners.cpp',
-            'workers/ParentFrameTaskRunners.h',
             'workers/SharedWorker.cpp',
             'workers/SharedWorker.h',
             'workers/SharedWorkerGlobalScope.cpp',
             'workers/SharedWorkerGlobalScope.h',
             'workers/SharedWorkerRepositoryClient.h',
             'workers/SharedWorkerThread.cpp',
             'workers/SharedWorkerThread.h',
             'workers/Worker.cpp',
             'workers/Worker.h',
             'workers/WorkerBackingThread.cpp',
@@ skipping 1961 matching lines @@
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'timing/PerformanceBaseTest.cpp',
             'timing/PerformanceObserverTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'workers/WorkerThreadTestHelper.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }