Add nvprmsaa4 and nvprmsaa16 configs to bench_pictures

Add nvprmsaa4 and nvprmsaa16 configs to bench_pictures.

R=bsalomon@google.com

Author: kkinnunen@nvidia.com

Review URL: https://codereview.chromium.org/189263012

git-svn-id: http://skia.googlecode.com/svn/trunk@13708 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/PictureRenderer.cpp b/tools/PictureRenderer.cpp
index 6d9ce62..35b1b61 100644
--- a/tools/PictureRenderer.cpp
+++ b/tools/PictureRenderer.cpp
@@ -152,7 +152,8 @@
         case kMesa_DeviceType:
             // fall through
 #endif
-        case kGPU_DeviceType: {
+        case kGPU_DeviceType:
+        case kNVPR_DeviceType: {
             SkAutoTUnref<GrSurface> target;
             if (fGrContext) {
                 // create a render target to back the device