CachedMetadata support for ServiceWorker script.

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/AnimationNode.idl',
@@ skipping 1379 matching lines @@
             'editing/VisibleSelection.cpp',
             'editing/VisibleUnits.cpp',
             'editing/WrapContentsInDummySpanCommand.cpp',
             'editing/WrapContentsInDummySpanCommand.h',
             'editing/htmlediting.cpp',
             'editing/markup.cpp',
             'fetch/AccessControlStatus.h',
             'fetch/CSSStyleSheetResource.cpp',
             'fetch/CSSStyleSheetResource.h',
             'fetch/CachedMetadata.h',
+            'fetch/CachedMetadataHandler.h',
             'fetch/CrossOriginAccessControl.cpp',
             'fetch/CrossOriginAccessControl.h',
             'fetch/DocumentResource.cpp',
             'fetch/DocumentResource.h',
             'fetch/DocumentResourceReference.h',
             'fetch/FetchContext.cpp',
             'fetch/FetchContext.h',
             'fetch/FetchInitiatorInfo.h',
             'fetch/FetchRequest.cpp',
             'fetch/FetchRequest.h',
@@ skipping 2394 matching lines @@
             'rendering/RenderingTestHelper.h',
             'streams/ExclusiveStreamReaderTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }