fix when DEVICE_CONFIG is still defined

src/gpu/SkGpuDevice.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 "SkGpuDevice.h"
 
 #include "effects/GrBicubicEffect.h"
@@ skipping 339 matching lines @@
 SK_COMPILE_ASSERT(SkShader::kLinear_BitmapType == 6, shader_type_mismatch);
 SK_COMPILE_ASSERT(SkShader::kLast_BitmapType == 6, shader_type_mismatch);
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifdef SK_SUPPORT_LEGACY_DEVICE_CONFIG
 SkBitmap::Config SkGpuDevice::config() const {
     if (NULL == fRenderTarget) {
         return SkBitmap::kNo_Config;
     }
-
-    bool isOpaque;
-    return grConfig2skConfig(fRenderTarget->config(), &isOpaque);
+    return SkColorTypeToBitmapConfig(fRenderTarget->info().colorType());
 }
 #endif
 
 void SkGpuDevice::clear(SkColor color) {
     SkIRect rect = SkIRect::MakeWH(this->width(), this->height());
     fContext->clear(&rect, SkColor2GrColor(color), true, fRenderTarget);
     fNeedClear = false;
 }
 
 void SkGpuDevice::drawPaint(const SkDraw& draw, const SkPaint& paint) {
@@ skipping 1603 matching lines @@
         GrCachedLayer* layer = fContext->getLayerCache()->findLayerOrCreate(picture, i);
 
         if (NULL != layer->getTexture()) {
             fContext->unlockScratchTexture(layer->getTexture());
             layer->setTexture(NULL);
         }
     }
 
     return true;
 }