Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/wtf/wtf.gypi

 # For GN compatibility, this file can not have any conditions.
 {
     'variables': {
         'wtf_files': [
             'ASCIICType.cpp',
             'ASCIICType.h',
             'AddressSanitizer.h',
             'Alignment.h',
             'Allocator.h',
             'Assertions.cpp',
@@ skipping 41 matching lines @@
             'InstanceCounter.h',
             'LeakAnnotations.h',
             'LinkedStack.h',
             'ListHashSet.h',
             'Locker.h',
             'MathExtras.h',
             'NonCopyingSort.h',
             'Noncopyable.h',
             'NotFound.h',
             'Optional.h',
+            'OwnPtr.h',
+            'OwnPtrCommon.h',
+            'PassOwnPtr.h',
             'PassRefPtr.h',
             'PrintStream.cpp',
             'PrintStream.h',
             'PtrUtil.h',
             'RefCounted.h',
             'RefPtr.h',
             'RetainPtr.h',
             'SaturatedArithmetic.h',
             'SizeLimits.cpp',
             'SpinLock.cpp',
@@ skipping 154 matching lines @@
             'text/StringOperatorsTest.cpp',
             'text/StringViewTest.cpp',
             'text/TextCodecTest.cpp',
             'text/TextCodecReplacementTest.cpp',
             'text/TextCodecUTF8Test.cpp',
             'text/WTFStringTest.cpp',
             'typed_arrays/ArrayBufferBuilderTest.cpp',
         ],
     },
 }