Componentization: fix SupplementTracing<0>::~SupplementTracing<0>(void) already defined.

Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
@@ skipping 97 matching lines @@
       'SecureTextInput.cpp',
       'SecureTextInput.h',
       'SerializedResource.h',
       'SharedBuffer.cpp',
       'SharedBuffer.h',
       'SharedBufferChunkReader.cpp',
       'SharedBufferChunkReader.h',
       'SharedTimer.cpp',
       'SharedTimer.h',
       'StorageQuotaCallbacks.h',
+      'Supplementable.cpp',
       'Supplementable.h',
       'Task.h',
       'TaskSynchronizer.cpp',
       'TaskSynchronizer.h',
       'Theme.cpp',
       'Theme.h',
       'ThemeTypes.h',
       'ThreadedDataReceiver.h',
       'ThreadTimers.cpp',
       'ThreadTimers.h',
@@ skipping 869 matching lines @@
       'image-decoders/webp/WEBPImageDecoderTest.cpp',
     ],
     'platform_unittest_support_files': [
       'testing/URLTestHelpers.cpp',
       'testing/URLTestHelpers.h',
       'testing/UnitTestHelpers.cpp',
       'testing/UnitTestHelpers.h',
     ],
   },
 }