Android should be able to discard CachedResources

Source/core/core_tmp.gyp

 #
 # Copyright (C) 2009 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 695 matching lines @@
             ['include', 'platform/graphics/mac/FloatPointMac\\.mm$'],
             ['include', 'platform/graphics/mac/FloatRectMac\\.mm$'],
             ['include', 'platform/graphics/mac/FloatSizeMac\\.mm$'],
             ['include', 'platform/graphics/mac/GlyphPageTreeNodeMac\\.cpp$'],
             ['include', 'platform/graphics/mac/IntPointMac\\.mm$'],
             ['include', 'platform/graphics/mac/IntRectMac\\.mm$'],
             ['include', 'platform/mac/BlockExceptions\\.mm$'],
             ['include', 'platform/mac/KillRingMac\\.mm$'],
             ['include', 'platform/mac/LocalCurrentGraphicsContext\\.mm$'],
             ['include', 'platform/mac/NSScrollerImpDetails\\.mm$'],
-            ['include', 'platform/mac/PurgeableBufferMac\\.cpp$'],
             ['include', 'platform/mac/ScrollbarThemeMac\\.mm$'],
             ['include', 'platform/mac/ScrollAnimatorMac\\.mm$'],
             ['include', 'platform/mac/ScrollElasticityController\\.mm$'],
             ['include', 'platform/mac/ThemeMac\\.h$'],
             ['include', 'platform/mac/ThemeMac\\.mm$'],
             ['include', 'platform/mac/WebCoreSystemInterface\\.h$'],
             ['include', 'platform/mac/WebCoreTextRenderer\\.mm$'],
             ['include', 'platform/text/mac/ShapeArabic\\.c$'],
             ['include', 'platform/text/mac/String(Impl)?Mac\\.mm$'],
             # Use USE_NEW_THEME on Mac.
@@ skipping 374 matching lines @@
         '<(SHARED_INTERMEDIATE_DIR)/webkit/bindings/V8InternalSettingsGenerated.h',
         '<(SHARED_INTERMEDIATE_DIR)/webcore/bindings/V8InternalRuntimeFlags.cpp',
         '<(SHARED_INTERMEDIATE_DIR)/webkit/bindings/V8InternalRuntimeFlags.h',
       ],
       'sources/': [
         ['exclude', 'testing/js'],
       ],
     },
   ],  # targets
 }