Use SkImageCacherator in SkImages

src/image/SkImage_Raster.cpp

Index: src/image/SkImage_Raster.cpp
diff --git a/src/image/SkImage_Raster.cpp b/src/image/SkImage_Raster.cpp
index 51bc6f03e2930d9a60a25aebf155a77315ca2412..0386a937130f43793262338b062d23e15dccd209 100644
--- a/src/image/SkImage_Raster.cpp
+++ b/src/image/SkImage_Raster.cpp
@@ -222,18 +222,6 @@ SkImage* SkImage::NewFromRaster(const SkImageInfo& info, const void* pixels, siz
     return SkNEW_ARGS(SkImage_Raster, (info, data, rowBytes, ctable, NULL));
 }
 
-SkImage* SkImage::NewFromGenerator(SkImageGenerator* generator, const SkIRect* subset) {
-    SkBitmap bitmap;
-    if (!SkInstallDiscardablePixelRef(generator, subset, &bitmap, NULL)) {
-        return NULL;
-    }
-    if (0 == bitmap.width() || 0 == bitmap.height()) {
-        return NULL;
-    }
-
-    return SkNEW_ARGS(SkImage_Raster, (bitmap, NULL));
-}
-
 SkImage* SkNewImageFromPixelRef(const SkImageInfo& info, SkPixelRef* pr,
                                 const SkIPoint& pixelRefOrigin, size_t rowBytes,
                                 const SkSurfaceProps* props) {