Move Layout unit test into webkit_unit_tests.

Tools/TestWebKitAPI/TestWebKitAPI.gypi

 #
 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #         * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #         * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
 {
     'variables': {
         'TestWebKitAPI_files': [
-            'Tests/WebCore/LayoutUnit.cpp',
             'Tests/WTF/AtomicString.cpp',
             'Tests/WTF/CheckedArithmeticOperations.cpp',
             'Tests/WTF/CString.cpp',
             'Tests/WTF/Functional.cpp',
             'Tests/WTF/HashMap.cpp',
             'Tests/WTF/HashSet.cpp',
             'Tests/WTF/ListHashSet.cpp',
             'Tests/WTF/MathExtras.cpp',
             'Tests/WTF/MediaTime.cpp',
             'Tests/WTF/MemoryInstrumentationTest.cpp',
             'Tests/WTF/SaturatedArithmeticOperations.cpp',
             'Tests/WTF/StringBuilder.cpp',
             'Tests/WTF/StringHasher.cpp',
             'Tests/WTF/StringImpl.cpp',
             'Tests/WTF/StringOperators.cpp',
             'Tests/WTF/TemporaryChange.cpp',
             'Tests/WTF/Vector.cpp',
             'Tests/WTF/VectorBasic.cpp',
             'Tests/WTF/VectorReverse.cpp',
             'Tests/WTF/WTFString.cpp',
         ],
     },
 }