rename GrTextureDesc->GrSurfaceDesc, GrTextureFlags->GrSurfaceFlags

Review URL: https://codereview.chromium.org/682223002
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index cb7816b..da0f38f 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -1759,9 +1759,9 @@
             bool grSuccess = false;
             if (gr) {
                 // create a render target to back the device
-                GrTextureDesc desc;
+                GrSurfaceDesc desc;
                 desc.fConfig = kSkia8888_GrPixelConfig;
-                desc.fFlags = kRenderTarget_GrTextureFlagBit;
+                desc.fFlags = kRenderTarget_GrSurfaceFlag;
                 desc.fWidth = gm->getISize().width();
                 desc.fHeight = gm->getISize().height();
                 desc.fSampleCnt = config.fSampleCnt;