Add the lazy decoder from PictureFlags to SkImageDecoder

tools/lua/lua_pictures.cpp

Index: tools/lua/lua_pictures.cpp
diff --git a/tools/lua/lua_pictures.cpp b/tools/lua/lua_pictures.cpp
index f1bca287ad490dae592c4ed33ef00bf6bbb8053b..869317099cea1af96fe654d0cddfb8209b5e69de 100644
--- a/tools/lua/lua_pictures.cpp
+++ b/tools/lua/lua_pictures.cpp
@@ -17,8 +17,6 @@
 #include "SkImageDecoder.h"
 #include "SkForceLinking.h"
 
-__SK_FORCE_IMAGE_DECODER_LINKING;
-
 extern "C" {
     #include "lua.h"
     #include "lualib.h"
@@ -30,9 +28,6 @@ static const char gEndCanvasFunc[] = "sk_scrape_endcanvas";
 static const char gAccumulateFunc[] = "sk_scrape_accumulate";
 static const char gSummarizeFunc[] = "sk_scrape_summarize";
 
-// PictureRenderingFlags.cpp
-extern bool lazy_decode_bitmap(const void* buffer, size_t size, SkBitmap*);
-
 // Example usage for the modulo flag:
 // for i in {0..5}; do lua_pictures --skpPath SKP_PATH -l YOUR_SCRIPT --modulo $i 6 &; done
 DEFINE_string(modulo, "", "[--modulo <remainder> <divisor>]: only run tests for which "
@@ -46,7 +41,7 @@ static SkPicture* load_picture(const char path[]) {
     SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
     SkPicture* pic = NULL;
     if (stream.get()) {
-        pic = SkPicture::CreateFromStream(stream.get(), &lazy_decode_bitmap);
+        pic = SkPicture::CreateFromStream(stream.get(), &SkImageDecoder::LazyDecodeBitmap);
     }
     return pic;
 }