Get rid of WTF::SHA1.

Source/platform/blink_platform.gypi

 {
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.cpp',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
       'Clock.h',
       'ColorChooser.cpp',
       'ColorChooser.h',
       'ColorChooserClient.cpp',
       'ColorChooserClient.h',
       'ContentType.cpp',
       'ContentType.h',
       'ContextMenu.cpp',
       'ContextMenu.h',
       'ContextMenuItem.cpp',
       'ContextMenuItem.h',
       'Cookie.h',
       'CrossThreadCopier.cpp',
       'CrossThreadCopier.h',
       'CryptoResult.h',
+      'CryptoUtilities.cpp',
+      'CryptoUtilities.h',
       'Cursor.cpp',
       'Cursor.h',
       'DateComponents.cpp',
       'DateComponents.h',
       'DateTimeChooser.cpp',
       'DateTimeChooser.h',
       'DateTimeChooserClient.cpp',
       'DateTimeChooserClient.h',
       'Decimal.cpp',
       'Decimal.h',
@@ skipping 879 matching lines @@
     # NOTE: these are legacy unit tests, do not add more!
     'platform_web_unittest_files': [
       'animation/TimingFunctionTest.cpp',
       'graphics/DeferredImageDecoderTest.cpp',
       'graphics/ImageDecodingStoreTest.cpp',
       'graphics/ImageFrameGeneratorTest.cpp',
       'graphics/test/MockImageDecoder.h',
     ],
   },
 }