remove/deprecate SkBitmap::getTexture, as it now always returns false

src/core/SkBitmapProvider.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProvider.h"
 #include "SkImage_Base.h"
 #include "SkPixelRef.h"
@@ skipping 11 matching lines @@
 }
 
 bool SkBitmapProvider::validForDrawing() const {
     if (!fImage) {
         if (0 == fBitmap.width() || 0 == fBitmap.height()) {
             return false;
         }
         if (nullptr == fBitmap.pixelRef()) {
             return false;   // no pixels to read
         }
-        if (fBitmap.getTexture()) {
-            // we can handle texture (ugh) since lockPixels will perform a read-back
-            return true;
-        }
         if (kIndex_8_SkColorType == fBitmap.colorType()) {
             SkAutoLockPixels alp(fBitmap); // but we need to call it before getColorTable() is safe.
             if (!fBitmap.getColorTable()) {
                 return false;
             }
         }
     }
     return true;
 }
 
@@ skipping 30 matching lines @@
 }
 
 bool SkBitmapProvider::asBitmap(SkBitmap* bm) const {
     if (fImage) {
         return as_IB(fImage)->getROPixels(bm, SkImage::kAllow_CachingHint);
     } else {
         *bm = fBitmap;
         return true;
     }
 }