WebDataConsumerHandle shouldn't be used on non-Oilpan threads.

Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
@@ skipping 256 matching lines @@
       'exported/WebContentDecryptionModuleSession.cpp',
       'exported/WebContentSettingCallbacks.cpp',
       'exported/WebConvertableToTraceFormat.cpp',
       'exported/WebCredential.cpp',
       'exported/WebCryptoAlgorithm.cpp',
       'exported/WebCryptoKey.cpp',
       'exported/WebCryptoKeyAlgorithm.cpp',
       'exported/WebCryptoResult.cpp',
       'exported/WebCursorInfo.cpp',
       'exported/WebData.cpp',
+      'exported/WebDataConsumerHandle.cpp',
       'exported/WebDeviceMotionData.cpp',
       'exported/WebDeviceOrientationData.cpp',
       'exported/WebDisplayItemTransformTree.cpp',
       'exported/WebDragData.cpp',
       'exported/WebEncryptedMediaClient.cpp',
       'exported/WebEncryptedMediaKeyInformation.cpp',
       'exported/WebEncryptedMediaRequest.cpp',
       'exported/WebFederatedCredential.cpp',
       'exported/WebFileSystemCallbacks.cpp',
       'exported/WebFilterKeyframe.cpp',
@@ skipping 752 matching lines @@
       ['os_posix==1 and OS!="mac"',
         {
           'platform_test_files': [
             'text/LocaleICUTest.cpp',
           ],
         }
       ],
     ],
   },
 }