Implement support for mixed sampled render targets

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 337f400056f87c9d48d7d536c6ae3d30568a4c55..c03dcfe231e74ec3821a18fb35bffdffa3600573 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -322,7 +322,7 @@ void SkGpuDevice::replaceRenderTarget(bool shouldRetainContent) {
                                                        : SkSurface::kNo_Budgeted;
 
     SkAutoTUnref<GrRenderTarget> newRT(CreateRenderTarget(
-        fRenderTarget->getContext(), budgeted, this->imageInfo(), fRenderTarget->numSamples()));
+        fRenderTarget->getContext(), budgeted, this->imageInfo(), fRenderTarget->desc().fSampleCnt));
 
     if (NULL == newRT) {
         return;
@@ -1935,7 +1935,7 @@ SkBaseDevice* SkGpuDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = cinfo.fInfo.width();
     desc.fHeight = cinfo.fInfo.height();
-    desc.fSampleCnt = fRenderTarget->numSamples();
+    desc.fSampleCnt = fRenderTarget->desc().fSampleCnt;
 
     SkAutoTUnref<GrTexture> texture;
     // Skia's convention is to only clear a device if it is non-opaque.
@@ -1963,7 +1963,7 @@ SkBaseDevice* SkGpuDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint
 SkSurface* SkGpuDevice::newSurface(const SkImageInfo& info, const SkSurfaceProps& props) {
     // TODO: Change the signature of newSurface to take a budgeted parameter.
     static const SkSurface::Budgeted kBudgeted = SkSurface::kNo_Budgeted;
-    return SkSurface::NewRenderTarget(fContext, kBudgeted, info, fRenderTarget->numSamples(),
+    return SkSurface::NewRenderTarget(fContext, kBudgeted, info, fRenderTarget->desc().fSampleCnt,
                                       &props);
 }