Switch speech synthesis from compile-flag to runtime-flag.

Source/core/core.gyp/core.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 247 matching lines @@
         # files in the same output directory.
         '<(SHARED_INTERMEDIATE_DIR)/webcore',
         '<(SHARED_INTERMEDIATE_DIR)/webkit',
         '<(SHARED_INTERMEDIATE_DIR)/webkit/bindings',
         '<@(webcore_include_dirs)',
 
         # FIXME: Remove these once the bindings script generates qualified
         # includes for these correctly. (Sequences don't work yet.)
         '<(bindings_dir)/v8/custom',
         '../../modules/mediastream',
+        '../../modules/speech',
         '../dom',
         '../html',
         '../html/shadow',
         '../inspector',
         '../page',
         '../svg', # FIXME: make_names.pl doesn't qualify conditional includes yet.
       ],
       'sources': [
         # These files include all the .cpp files generated from the .idl files
         # in webcore_files.
@@ skipping 885 matching lines @@
         '<(SHARED_INTERMEDIATE_DIR)/webkit/bindings/V8InternalSettings.h',
         '<(SHARED_INTERMEDIATE_DIR)/webcore/bindings/V8InternalSettingsGenerated.cpp',
         '<(SHARED_INTERMEDIATE_DIR)/webkit/bindings/V8InternalSettingsGenerated.h',
       ],
       'sources/': [
         ['exclude', 'testing/js'],
       ],
     },
   ],  # targets
 }