remove code from SK_SUPPORT_LEGACY_NEWFROMGENERATOR, eliminates caller of deprecated SkInstallDisca…

src/image/SkImage_Raster.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImage_Base.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 262 matching lines @@
         // pixelref since the caller might call setImmutable() themselves
         // (thus changing our state).
         if (fBitmap.isImmutable()) {
             bitmap->setInfo(fBitmap.info(), fBitmap.rowBytes());
             bitmap->setPixelRef(fBitmap.pixelRef(), fBitmap.pixelRefOrigin());
             return true;
         }
     }
     return this->INHERITED::onAsLegacyBitmap(bitmap, mode);
 }
-
-#ifdef SK_SUPPORT_LEGACY_NEWFROMGENERATOR
-SkImage* SkImage::NewFromGenerator(SkImageGenerator* generator, const SkIRect* subset) {
-    SkBitmap bitmap;
-    if (!SkInstallDiscardablePixelRef(generator, subset, &bitmap, nullptr)) {
-        return nullptr;
-    }
-    if (0 == bitmap.width() || 0 == bitmap.height()) {
-        return nullptr;
-    }
-    return new SkImage_Raster(bitmap, nullptr);
-}
-#endif