Add animation support for WebP images

Source/WebKit/chromium/WebKit.gypi

 #
 # Copyright (C) 2010 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 83 matching lines @@
             'tests/URLTestHelpers.cpp',
             'tests/URLTestHelpers.h',
             'tests/WebCompositorInitializer.h',
             'tests/WebCompositorInputHandlerImplTest.cpp',
             'tests/WebFrameTest.cpp',
             'tests/WebImageTest.cpp',
             'tests/WebInputEventConversionTest.cpp',
             'tests/WebInputEventFactoryTestMac.mm',
             'tests/WebPageNewSerializerTest.cpp',
             'tests/WebPageSerializerTest.cpp',
+            'tests/WEBPImageDecoderTest.cpp',
             'tests/WebPluginContainerTest.cpp',
             'tests/WebUserGestureTokenTest.cpp',
             'tests/WebSocketDeflaterTest.cpp',
             'tests/WebSocketExtensionDispatcherTest.cpp',
             'tests/WebURLRequestTest.cpp',
             'tests/WebURLResponseTest.cpp',
             'tests/WebViewTest.cpp',
         ],
 
         'conditions': [
@@ skipping 32 matching lines @@
             }],
         ],
     },
 }
 
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