WebCrypto: Add SHA-1 support to crypto.subtle.digest().

Source/web/web.gypi

 {
   'variables': {
     'web_files': [
       'ApplicationCacheHost.cpp',
       'ApplicationCacheHostInternal.h',
       'AssertMatchingEnums.cpp',
       'AssociatedURLLoader.cpp',
       'AssociatedURLLoader.h',
       'AsyncFileSystemChromium.cpp',
       'AsyncFileSystemChromium.h',
@@ skipping 92 matching lines @@
       'StorageNamespaceProxy.cpp',
       'StorageNamespaceProxy.h',
       'StorageQuotaChromium.cpp',
       'UserMediaClientImpl.cpp',
       'UserMediaClientImpl.h',
       'ValidationMessageClientImpl.cpp',
       'ValidationMessageClientImpl.h',
       'ViewportAnchor.cpp',
       'ViewportAnchor.h',
       'WebAccessibilityObject.cpp',
-      'WebArrayBuffer.cpp',
       'WebArrayBufferView.cpp',
       'WebBindings.cpp',
       'WebBlob.cpp',
       'WebBlobData.cpp',
       'WebCache.cpp',
       'WebCachedURLRequest.cpp',
       'WebColorName.cpp',
       'WebCrossOriginPreflightResultCache.cpp',
       'WebDOMActivityLogger.cpp',
       'WebDOMCustomEvent.cpp',
@@ skipping 166 matching lines @@
       'painting/ContinuousPainter.h',
       'painting/PaintAggregator.cpp',
       'painting/PaintAggregator.h',
       'win/WebInputEventFactory.cpp',
     ],
     'web_unittest_files': [
       'tests/AssociatedURLLoaderTest.cpp',
     ],
   },
 }