Remove Blink's DatabaseIdentifier implementation

third_party/WebKit/Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'ContentDecryptionModuleResult.h',
@@ skipping 1078 matching lines @@
       'v8_inspector/public/V8ProfilerAgent.h',
       'v8_inspector/public/V8RuntimeAgent.h',
       'v8_inspector/public/V8StackTrace.h',
       'v8_inspector/public/V8ToProtocolValue.h',
       'web_memory_allocator_dump_impl.cc',
       'web_memory_allocator_dump_impl.h',
       'web_memory_dump_provider_adapter.cc',
       'web_memory_dump_provider_adapter.h',
       'web_process_memory_dump_impl.cc',
       'web_process_memory_dump_impl.h',
-      'weborigin/DatabaseIdentifier.cpp',
-      'weborigin/DatabaseIdentifier.h',
       'weborigin/KURL.cpp',
       'weborigin/KURL.h',
       'weborigin/KURLHash.h',
       'weborigin/KnownPorts.cpp',
       'weborigin/KnownPorts.h',
       'weborigin/OriginAccessEntry.cpp',
       'weborigin/OriginAccessEntry.h',
       'weborigin/Referrer.h',
       'weborigin/ReferrerPolicy.h',
       'weborigin/SchemeRegistry.cpp',
@@ skipping 102 matching lines @@
       'text/BidiResolverTest.cpp',
       'text/DateTimeFormatTest.cpp',
       'text/LocaleToScriptMappingTest.cpp',
       'text/SegmentedStringTest.cpp',
       'text/TextBreakIteratorTest.cpp',
       'text/UnicodeUtilitiesTest.cpp',
       'transforms/TransformOperationsTest.cpp',
       'transforms/TransformTestHelper.h',
       'transforms/TransformationMatrixTest.cpp',
       'web_process_memory_dump_impl_test.cc',
-      'weborigin/DatabaseIdentifierTest.cpp',
       'weborigin/KnownPortsTest.cpp',
       'weborigin/KURLTest.cpp',
       'weborigin/OriginAccessEntryTest.cpp',
       'weborigin/SchemeRegistryTest.cpp',
       'weborigin/SecurityOriginTest.cpp',
       'weborigin/SecurityPolicyTest.cpp',
     ],
     # NOTE: These are legacy unit tests and tests that require a Platform
     # object. Do not add more unless the test requires a Platform object.
     # These tests are a part of the web:webkit_unit_tests binary.
@@ skipping 56 matching lines @@
       ['OS!="mac"',
         {
           'platform_test_files': [
             'scroll/ScrollAnimatorTest.cpp',
           ],
         }
       ],
     ],
   },
 }