Move core/platform/animation files

Source/web/web.gypi

 {
   'variables': {
     'web_files': [
       'ApplicationCacheHost.cpp',
       'ApplicationCacheHostInternal.h',
       'AssertMatchingEnums.cpp',
       'AssociatedURLLoader.cpp',
       'AssociatedURLLoader.h',
       'BackForwardClientImpl.cpp',
       'BackForwardClientImpl.h',
@@ skipping 247 matching lines @@
       'default/WebRenderTheme.cpp',
       'linux/WebFontRendering.cpp',
       'mac/WebScrollbarTheme.cpp',
       'mac/WebSubstringUtil.mm',
       'painting/ContinuousPainter.cpp',
       'painting/ContinuousPainter.h',
       'painting/PaintAggregator.cpp',
       'painting/PaintAggregator.h',
     ],
     'web_unittest_files': [
-      '../platform/graphics/DeferredImageDecoderTest.cpp',
-      '../platform/graphics/ImageDecodingStoreTest.cpp',
-      '../platform/graphics/ImageFrameGeneratorTest.cpp',
-      '../platform/graphics/test/MockImageDecoder.h',
       'tests/AssociatedURLLoaderTest.cpp',
       'tests/BitmapImageTest.cpp',
       'tests/Canvas2DLayerBridgeTest.cpp',
       'tests/Canvas2DLayerManagerTest.cpp',
       'tests/ChromeClientImplTest.cpp',
       'tests/CompositedLayerMappingTest.cpp',
       'tests/CustomEventTest.cpp',
       'tests/DragImageTest.cpp',
       'tests/DrawingBufferTest.cpp',
       'tests/FakeWebPlugin.cpp',
@@ skipping 90 matching lines @@
         {
           'web_unittest_files': [
             'tests/KeyCodeConversionTestGtk.cpp',
             'tests/WebInputEventFactoryTestGtk.cpp',
           ],
         }
       ],
     ],
   },
 }