Move blink platform's JSON code into a directory.

third_party/WebKit/Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'ContentDecryptionModuleResult.h',
@@ skipping 24 matching lines @@
       'EventTracer.h',
       'FileChooser.cpp',
       'FileChooser.h',
       'FileMetadata.cpp',
       'FileMetadata.h',
       'FileSystemType.h',
       'FloatConversion.h',
       'Histogram.cpp',
       'Histogram.h',
       'HostWindow.h',
-      'JSONParser.cpp',
-      'JSONParser.h',
-      'JSONValues.cpp',
-      'JSONValues.h',
       'KeyboardCodes.h',
       'KillRing.h',
       'KillRingNone.cpp',
       'Language.cpp',
       'Language.h',
       'LayoutLocale.cpp',
       'LayoutLocale.h',
       'LayoutTestSupport.cpp',
       'LayoutTestSupport.h',
       'LayoutUnit.cpp',
@@ skipping 782 matching lines @@
       'image-decoders/png/PNGImageDecoder.cpp',
       'image-decoders/png/PNGImageDecoder.h',
       'image-decoders/webp/WEBPImageDecoder.cpp',
       'image-decoders/webp/WEBPImageDecoder.h',
       'image-encoders/JPEGImageEncoder.cpp',
       'image-encoders/JPEGImageEncoder.h',
       'image-encoders/PNGImageEncoder.cpp',
       'image-encoders/PNGImageEncoder.h',
       'image-encoders/WEBPImageEncoder.cpp',
       'image-encoders/WEBPImageEncoder.h',
+      'json/JSONParser.cpp',
+      'json/JSONParser.h',
+      'json/JSONValues.cpp',
+      'json/JSONValues.h',
       'mac/BlockExceptions.h',
       'mac/BlockExceptions.mm',
       'mac/ColorMac.h',
       'mac/ColorMac.mm',
       'mac/KillRingMac.mm',
       'mac/LocalCurrentGraphicsContext.h',
       'mac/LocalCurrentGraphicsContext.mm',
       'mac/NSScrollerImpDetails.h',
       'mac/ScrollAnimatorMac.h',
       'mac/ScrollAnimatorMac.mm',
@@ skipping 358 matching lines @@
       'weborigin/Suborigin.h',
     ],
     'platform_test_files': [
       'ScopedOrientationChangeIndicatorTest.cpp',
       'DecimalTest.cpp',
       'DragImageTest.cpp',
       'HistogramTest.cpp',
       'LayoutLocaleTest.cpp',
       'LayoutUnitTest.cpp',
       'LifecycleContextTest.cpp',
-      'JSONParserTest.cpp',
       'PODArenaTest.cpp',
       'PODFreeListArenaTest.cpp',
       'PODIntervalTreeTest.cpp',
       'PODRedBlackTreeTest.cpp',
       'PurgeableVectorTest.cpp',
       'SharedBufferTest.cpp',
       'TimerTest.cpp',
       'TracedValueTest.cpp',
       'UserGestureIndicatorTest.cpp',
       'UUIDTest.cpp',
@@ skipping 63 matching lines @@
       'graphics/paint/PropertyTreeStateTest.cpp',
       'image-decoders/FastSharedBufferReaderTest.cpp',
       'image-decoders/ImageDecoderTest.cpp',
       'image-decoders/ImageDecoderTestHelpers.cpp',
       'image-decoders/ImageDecoderTestHelpers.h',
       'image-decoders/bmp/BMPImageDecoderTest.cpp',
       'image-decoders/gif/GIFImageDecoderTest.cpp',
       'image-decoders/jpeg/JPEGImageDecoderTest.cpp',
       'image-decoders/webp/WEBPImageDecoderTest.cpp',
       'image-decoders/ico/ICOImageDecoderTest.cpp',
+      'json/JSONParserTest.cpp',
       'mac/VersionUtilMacTest.mm',
       'mojo/KURLSecurityOriginTest.cpp',
       'network/EncodedFormDataTest.cpp',
       'network/HTTPParsersTest.cpp',
       'network/LinkHeaderTest.cpp',
       'network/NetworkUtilsTest.cpp',
       'network/ResourceRequestTest.cpp',
       'network/ResourceResponseTest.cpp',
       'scheduler/CancellableTaskFactoryTest.cpp',
       'scheduler/base/long_task_tracker_unittest.cc',
@@ skipping 139 matching lines @@
       ['use_default_render_theme==1',
         {
           'platform_test_files': [
             'scroll/ScrollbarThemeAuraTest.cpp',
           ],
         }
       ],
     ],
   },
 }