Separate core and images project.

src/images/SkImageDecoder.cpp

Index: src/images/SkImageDecoder.cpp
diff --git a/src/images/SkImageDecoder.cpp b/src/images/SkImageDecoder.cpp
index 52c43c83f17e8616397bb34c5875a6c14f8226f5..5c078ce63015a102370bbd6d435cdd54ce5d57fb 100644
--- a/src/images/SkImageDecoder.cpp
+++ b/src/images/SkImageDecoder.cpp
@@ -450,27 +450,3 @@ bool SkImageDecoder::DecodeStream(SkStream* stream, SkBitmap* bm,
     }
     return success;
 }
-
-/**
- *  This function leaks, but that is okay because it is not intended
- *  to be called. It is only here so that the linker will include the
- *  decoders.
- *  Make sure to keep it in sync with images.gyp, so only the encoders
- *  which are created on a platform are linked.
- */
-void force_linking();
-void force_linking() {
-    SkASSERT(false);
-    CreateJPEGImageDecoder();
-    CreateWEBPImageDecoder();
-    CreateBMPImageDecoder();
-    CreateICOImageDecoder();
-    CreateWBMPImageDecoder();
-    // Only link GIF and PNG on platforms that build them. See images.gyp
-#if !defined(SK_BUILD_FOR_MAC) && !defined(SK_BUILD_FOR_WIN) && !defined(SK_BUILD_FOR_NACL)
-    CreateGIFImageDecoder();
-#endif
-#if !defined(SK_BUILD_FOR_MAC) && !defined(SK_BUILD_FOR_WIN)
-    CreatePNGImageDecoder();
-#endif
-}