Fix linker warning in broadcast_channel.mojom-blink.obj.

third_party/WebKit/Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'ContentDecryptionModuleResult.h',
@@ skipping 1106 matching lines @@
       'v8_inspector/public/V8ContextInfo.h',
       'v8_inspector/public/V8Debugger.h',
       'v8_inspector/public/V8DebuggerClient.h',
       'v8_inspector/public/V8InspectorSession.h',
       'v8_inspector/public/V8InspectorSessionClient.h',
       'v8_inspector/public/V8StackTrace.h',
       'web_memory_allocator_dump.cc',
       'web_memory_allocator_dump.h',
       'web_process_memory_dump.cc',
       'web_process_memory_dump.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',
-      'weborigin/SchemeRegistry.h',
-      'weborigin/SecurityOrigin.cpp',
-      'weborigin/SecurityOrigin.h',
-      'weborigin/SecurityOriginCache.h',
-      'weborigin/SecurityOriginHash.h',
-      'weborigin/SecurityPolicy.cpp',
-      'weborigin/SecurityPolicy.h',
-      'weborigin/Suborigin.cpp',
-      'weborigin/Suborigin.h',
     ],
     'platform_test_files': [
       'ScopedOrientationChangeIndicatorTest.cpp',
       'DecimalTest.cpp',
       'DragImageTest.cpp',
       'HistogramTest.cpp',
       'LayoutLocaleTest.cpp',
       'LayoutUnitTest.cpp',
       'LifecycleContextTest.cpp',
       'PODArenaTest.cpp',
@@ skipping 197 matching lines @@
       ['use_default_render_theme==1',
         {
           'platform_test_files': [
             'scroll/ScrollbarThemeAuraTest.cpp',
           ],
         }
       ],
     ],
   },
 }