Add immediate mode option for gpu configs in dm

src/gpu/GrDrawingManager.cpp

Index: src/gpu/GrDrawingManager.cpp
diff --git a/src/gpu/GrDrawingManager.cpp b/src/gpu/GrDrawingManager.cpp
index 682b15511a335f980287df14c37ffe0680cf2ea4..0dbd476c791df31aa83d1e8bca44ead9f7de7af1 100644
--- a/src/gpu/GrDrawingManager.cpp
+++ b/src/gpu/GrDrawingManager.cpp
@@ -105,7 +105,8 @@ GrDrawTarget* GrDrawingManager::newDrawTarget(GrRenderTarget* rt) {
     }
 #endif
 
-    GrDrawTarget* dt = new GrDrawTarget(fContext->getGpu(), fContext->resourceProvider());
+    GrDrawTarget* dt = new GrDrawTarget(fContext->getGpu(), fContext->resourceProvider(),
+                                        fOptions);
 
     *fDrawTargets.append() = dt;