Move ThreadableLoader to Oilpan heap (2/3)

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/AnimationEffectReadOnly.idl',
             'animation/AnimationEffectTiming.idl',
@@ skipping 1953 matching lines @@
             'loader/PrerendererClient.h',
             'loader/ProgressTracker.cpp',
             'loader/SinkDocument.cpp',
             'loader/SinkDocument.h',
             'loader/TextResourceDecoderBuilder.cpp',
             'loader/TextResourceDecoderBuilder.h',
             'loader/TextTrackLoader.cpp',
             'loader/TextTrackLoader.h',
             'loader/ThreadableLoader.cpp',
             'loader/ThreadableLoaderClient.h',
-            'loader/ThreadableLoaderClientWrapper.h',
             'loader/WorkerThreadableLoader.cpp',
             'loader/WorkerThreadableLoader.h',
             'loader/appcache/ApplicationCache.cpp',
             'loader/appcache/ApplicationCache.h',
             'loader/appcache/ApplicationCacheHost.cpp',
             'loader/appcache/ApplicationCacheHost.h',
             'offscreencanvas/OffscreenCanvas.cpp',
             'offscreencanvas/OffscreenCanvas.h',
             'origin_trials/OriginTrialContext.cpp',
             'origin_trials/OriginTrialContext.h',
@@ skipping 2282 matching lines @@
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'timing/PerformanceBaseTest.cpp',
             'timing/PerformanceObserverTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'workers/WorkerThreadTestHelper.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }