remove SK_SUPPORT_LEGACY_BITMAPFLATTEN code

src/effects/SkBitmapSource.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapSource.h"
 #include "SkDevice.h"
 #include "SkCanvas.h"
@@ skipping 10 matching lines @@
 }
 
 SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap, const SkRect& srcRect, const SkRect& dstRect)
   : INHERITED(0, 0)
   , fBitmap(bitmap)
   , fSrcRect(srcRect)
   , fDstRect(dstRect) {}
 
 SkBitmapSource::SkBitmapSource(SkReadBuffer& buffer) : INHERITED(0, buffer) {
     if (buffer.isVersionLT(SkReadBuffer::kNoMoreBitmapFlatten_Version)) {
-        fBitmap.unflatten(buffer);
+        fBitmap.legacyUnflatten(buffer);
     } else {
         buffer.readBitmap(&fBitmap);
     }
     buffer.readRect(&fSrcRect);
     buffer.readRect(&fDstRect);
     buffer.validate(buffer.isValid() && SkIsValidRect(fSrcRect) && SkIsValidRect(fDstRect));
 }
 
 void SkBitmapSource::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
@@ skipping 42 matching lines @@
 
 void SkBitmapSource::computeFastBounds(const SkRect&, SkRect* dst) const {
     *dst = fDstRect;
 }
 
 bool SkBitmapSource::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                     SkIRect* dst) const {
     *dst = src;
     return true;
 }