Move createCrossThreadTask to ExecutionContextTask.h

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 2424 matching lines @@
             'dom/CompositorProxy.cpp',
             'dom/CompositorProxy.h',
             'dom/CompositorProxyClient.cpp',
             'dom/CompositorProxyClient.h',
             'dom/ContainerNode.cpp',
             'dom/ContextFeatures.cpp',
             'dom/ContextFeatures.h',
             'dom/ContextLifecycleNotifier.cpp',
             'dom/ContextLifecycleNotifier.h',
             'dom/ContextLifecycleObserver.h',
-            'dom/CrossThreadTask.h',
             'dom/DOMArrayBuffer.cpp',
             'dom/DOMArrayBuffer.h',
             'dom/DOMArrayBufferBase.h',
             'dom/DOMArrayBufferView.h',
             'dom/DOMArrayPiece.cpp',
             'dom/DOMArrayPiece.h',
             'dom/DOMDataView.cpp',
             'dom/DOMDataView.h',
             'dom/DOMError.cpp',
             'dom/DOMError.h',
@@ skipping 1629 matching lines @@
             'css/parser/CSSSelectorParserTest.cpp',
             'css/parser/CSSTokenizerTest.cpp',
             'css/parser/MediaConditionTest.cpp',
             'css/parser/SizesAttributeParserTest.cpp',
             'css/parser/SizesCalcParserTest.cpp',
             'css/resolver/FontBuilderTest.cpp',
             'css/resolver/MatchResultTest.cpp',
             'dom/ActiveDOMObjectTest.cpp',
             'dom/AttrTest.cpp',
             'dom/CSSSelectorWatchTest.cpp',
-            'dom/CrossThreadTaskTest.cpp',
             'dom/DOMImplementationTest.cpp',
             'dom/DocumentStatisticsCollectorTest.cpp',
             'dom/DocumentTest.cpp',
             'dom/ElementTest.cpp',
+            'dom/ExecutionContextTaskTest.cpp',
             'dom/MainThreadTaskRunnerTest.cpp',
             'dom/NodeTest.cpp',
             'dom/NthIndexCacheTest.cpp',
             'dom/RangeTest.cpp',
             'dom/ScriptRunnerTest.cpp',
             'dom/SelectorQueryTest.cpp',
             'dom/StaticRangeTest.cpp',
             'dom/StyleElementTest.cpp',
             'dom/StyleEngineTest.cpp',
             'dom/TextTest.cpp',
@@ skipping 184 matching lines @@
             'timing/MemoryInfoTest.cpp',
             'timing/PerformanceBaseTest.cpp',
             'timing/PerformanceObserverTest.cpp',
             'workers/DedicatedWorkerTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'workers/WorkerThreadTestHelper.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }