Add support for multiple frames in SkCodec

src/codec/SkAndroidCodec.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAndroidCodec.h"
 #include "SkCodec.h"
 #include "SkCodecPriv.h"
@@ skipping 18 matching lines @@
     }
 
     switch (codec->getEncodedFormat()) {
 #ifdef SK_HAS_PNG_LIBRARY
         case kPNG_SkEncodedFormat:
         case kICO_SkEncodedFormat:
 #endif
 #ifdef SK_HAS_JPEG_LIBRARY
         case kJPEG_SkEncodedFormat:
 #endif
-#ifdef SK_HAS_GIF_LIBRARY
         case kGIF_SkEncodedFormat:
-#endif
         case kBMP_SkEncodedFormat:
         case kWBMP_SkEncodedFormat:
             return new SkSampledCodec(codec.release());
 #ifdef SK_HAS_WEBP_LIBRARY
         case kWEBP_SkEncodedFormat:
             return new SkWebpAdapterCodec((SkWebpCodec*) codec.release());
 #endif
 #ifdef SK_CODEC_DECODES_RAW
         case kDNG_SkEncodedFormat:
             return new SkRawAdapterCodec((SkRawCodec*)codec.release());
@@ skipping 136 matching lines @@
         }
     }
 
     return this->onGetAndroidPixels(info, pixels, rowBytes, *options);
 }
 
 SkCodec::Result SkAndroidCodec::getAndroidPixels(const SkImageInfo& info, void* pixels,
         size_t rowBytes) {
     return this->getAndroidPixels(info, pixels, rowBytes, nullptr);
 }