switch to isABitmap, deprecate SK_SUPPORT_LEGACY_SHADERBITMAPTYPE

src/core/SkBitmapProcShader.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkBitmapProcState.h"
 #include "SkColorPriv.h"
 #include "SkErrorInternals.h"
 #include "SkPixelRef.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 
 #if SK_SUPPORT_GPU
 #include "effects/GrBicubicEffect.h"
 #include "effects/GrExtractAlphaFragmentProcessor.h"
 #include "effects/GrSimpleTextureEffect.h"
 #endif
 
 SkBitmapProcShader::SkBitmapProcShader(const SkBitmap& src, TileMode tmx, TileMode tmy,
                                        const SkMatrix* localMatrix)
         : INHERITED(localMatrix) {
     fRawBitmap = src;
     fTileModeX = (uint8_t)tmx;
     fTileModeY = (uint8_t)tmy;
 }
 
-SkShader::BitmapType SkBitmapProcShader::asABitmap(SkBitmap* texture,
-                                                   SkMatrix* texM,
-                                                   TileMode xy[]) const {
+bool SkBitmapProcShader::onIsABitmap(SkBitmap* texture, SkMatrix* texM, TileMode xy[]) const {
     if (texture) {
         *texture = fRawBitmap;
     }
     if (texM) {
         texM->reset();
     }
     if (xy) {
         xy[0] = (TileMode)fTileModeX;
         xy[1] = (TileMode)fTileModeY;
     }
-    return kDefault_BitmapType;
+    return true;
 }
 
 SkFlattenable* SkBitmapProcShader::CreateProc(SkReadBuffer& buffer) {
     SkMatrix lm;
     buffer.readMatrix(&lm);
     SkBitmap bm;
     if (!buffer.readBitmap(&bm)) {
         return nullptr;
     }
     bm.setImmutable();
@@ skipping 349 matching lines @@
         inner.reset(GrSimpleTextureEffect::Create(procDataManager, texture, matrix, params));
     }
 
     if (kAlpha_8_SkColorType == fRawBitmap.colorType()) {
         return SkRef(inner.get());
     }
     return GrExtractAlphaFragmentProcessor::Create(inner);
 }
 
 #endif