Separate core and images project.

src/images/SkForceLinking.cpp

+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkForceLinking.h"
+#include "SkImageDecoder.h"
+
+// This method is required to fool the linker into not discarding the pre-main
+// initialization and registration of the decoder classes. Passing true will
+// cause memory leaks.
+int SkForceLinking(bool doNotPassTrue) {
+    if (doNotPassTrue) {
+        SkASSERT(false);
+        CreateJPEGImageDecoder();
+        CreateWEBPImageDecoder();
+        CreateBMPImageDecoder();
+        CreateICOImageDecoder();
+        CreateWBMPImageDecoder();
+#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_WIN)
+        CreateDefaultDecoder();
+#endif
+        // 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
+        return -1;
+    }
+    return 0;
+}