fix opacity check in SkBitmapDevice::Create

src/core/SkBitmapDevice.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkConfig8888.h"
 #include "SkDraw.h"
@@ skipping 77 matching lines @@
         return nullptr;
     }
 
     const SkImageInfo info = origInfo.makeAlphaType(newAT);
     SkBitmap bitmap;
 
     if (kUnknown_SkColorType == info.colorType()) {
         if (!bitmap.setInfo(info)) {
             return nullptr;
         }
-    } else if (bitmap.info().isOpaque()) {
+    } else if (info.isOpaque()) {
         // If this bitmap is opaque, we don't have any sensible default color,
         // so we just return uninitialized pixels.
         if (!bitmap.tryAllocPixels(info)) {
             return nullptr;
         }
     } else {
         // This bitmap has transparency, so we'll zero the pixels (to transparent).
         // We use a ZeroedPRFactory as a faster alloc-then-eraseColor(SK_ColorTRANSPARENT).
         SkMallocPixelRef::ZeroedPRFactory factory;
         if (!bitmap.tryAllocPixels(info, &factory, nullptr/*color table*/)) {
@@ skipping 278 matching lines @@
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode))
     {
         return true;
     }
     return false;
 }