use surface instead of explicitly making gpudevice

tests/GpuDrawPathTest.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.
  */
 
 #if SK_SUPPORT_GPU
 
 #include "GrContext.h"
 #include "GrContextFactory.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkColor.h"
-#include "SkGpuDevice.h"
 #include "SkPaint.h"
 #include "SkRRect.h"
 #include "SkRect.h"
+#include "SkSurface.h"
 #include "Test.h"
 
 static void test_drawPathEmpty(skiatest::Reporter*, SkCanvas* canvas) {
     // Filling an empty path should not crash.
     SkPaint paint;
     canvas->drawRect(SkRect(), paint);
     canvas->drawPath(SkPath(), paint);
     canvas->drawOval(SkRect(), paint);
     canvas->drawRect(SkRect(), paint);
     canvas->drawRRect(SkRRect(), paint);
@@ skipping 18 matching lines @@
     for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
         GrContextFactory::GLContextType glType = static_cast<GrContextFactory::GLContextType>(type);
 
         GrContext* grContext = factory->get(glType);
         if (NULL == grContext) {
             continue;
         }
         static const int sampleCounts[] = { 0, 4, 16 };
 
         for (size_t i = 0; i < SK_ARRAY_COUNT(sampleCounts); ++i) {
-            const int W = 255;
-            const int H = 255;
-
-            GrTextureDesc desc;
-            desc.fConfig = kSkia8888_GrPixelConfig;
-            desc.fFlags = kRenderTarget_GrTextureFlagBit;
-            desc.fWidth = W;
-            desc.fHeight = H;
-            desc.fSampleCnt = sampleCounts[i];
-            SkAutoTUnref<GrTexture> texture(grContext->createUncachedTexture(desc, NULL, 0));
-            SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(texture.get()));
-            SkCanvas drawingCanvas(device.get());
-
-            test_drawPathEmpty(reporter, &drawingCanvas);
+            SkImageInfo info = SkImageInfo::MakeN32Premul(255, 255);
+            
+            SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(grContext, info, sampleCounts[i]));
+            test_drawPathEmpty(reporter, surface->getCanvas());
         }
     }
 }
 
 #endif