remove SkCanvas::createCompatibleDevice, and add SkCanvas::newSurface

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index da56009c55b823927100dabebd0c1340bfd3beef..8c272f947abc60fa3d648d9a1459a33531c61e1a 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -27,6 +27,7 @@
 #include "SkPathEffect.h"
 #include "SkRRect.h"
 #include "SkStroke.h"
+#include "SkSurface.h"
 #include "SkTLazy.h"
 #include "SkUtils.h"
 #include "SkErrorInternals.h"
@@ -1913,6 +1914,10 @@ SkBaseDevice* SkGpuDevice::onCreateCompatibleDevice(SkBitmap::Config config,
     }
 }
 
+SkSurface* SkGpuDevice::newSurface(const SkImageInfo& info) {
+    return SkSurface::NewRenderTarget(fContext, info, fRenderTarget->numSamples());
+}
+
 SkGpuDevice::SkGpuDevice(GrContext* context,
                          GrTexture* texture,
                          bool needClear)