Split SkBmpCodec into three separate classes

gyp/codec.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # GYP file for codec project.
@@ skipping 15 matching lines @@
         '-Wno-clobbered',
       ],
       'include_dirs': [
         '../include/codec',
         '../include/private',
         '../src/codec',
         '../src/core',
       ],
       'sources': [
         '../src/codec/SkBmpCodec.cpp',
+        '../src/codec/SkBmpMaskCodec.cpp',
+        '../src/codec/SkBmpRLECodec.cpp',
+        '../src/codec/SkBmpStandardCodec.cpp',
         '../src/codec/SkCodec.cpp',
         '../src/codec/SkCodec_libgif.cpp',
         '../src/codec/SkCodec_libico.cpp',
         '../src/codec/SkCodec_libpng.cpp',
         '../src/codec/SkCodec_wbmp.cpp',
         '../src/codec/SkGifInterlaceIter.cpp',
         '../src/codec/SkJpegCodec.cpp',
         '../src/codec/SkJpegDecoderMgr.cpp',
         '../src/codec/SkJpegUtility_codec.cpp',
         '../src/codec/SkMaskSwizzler.cpp',
@@ skipping 33 matching lines @@
             ],
             'cflags': [
               '-DTURBO_HAS_SKIP',
             ],
           }
         ]
       ]
     },
   ],
 }