add temporary cast to allow Skia roll

Test: refactoring CL. Existing unit tests still pass.

Change-Id: I2e2a647bfad76af313db70d196566e01bf909fc8
diff --git a/libs/hwui/SkiaCanvasProxy.cpp b/libs/hwui/SkiaCanvasProxy.cpp
index f6e92dc..8630902 100644
--- a/libs/hwui/SkiaCanvasProxy.cpp
+++ b/libs/hwui/SkiaCanvasProxy.cpp
@@ -193,7 +193,9 @@
     const float* vArray = (const float*)vertices->positions();
     const float* tArray = (const float*)vertices->texCoords();
     const int* cArray = (const int*)vertices->colors();
-    mCanvas->drawVertices(vertices->mode(), floatCount, vArray, tArray, cArray,
+    // Can remove this cast after changing to SkVertices::VertexMode
+    SkCanvas::VertexMode vmode = static_cast<SkCanvas::VertexMode>(vertices->mode());
+    mCanvas->drawVertices(vmode, floatCount, vArray, tArray, cArray,
             vertices->indices(), vertices->indexCount(), paint);
 }