move program descriptor generation to flush

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index d0bff30262c59a220af6dcea2ab25f87d89c1e52..c88e1c85d0b7dac7bdfb672747094f8be2b25f69 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -469,7 +469,7 @@ private:
     // deltas from previous state at draw time. This function does the
     // backend-specific flush of the state.
     // returns false if current state is unsupported.
-    virtual bool flushGraphicsState(const GrOptDrawState&, DrawType) = 0;
+    virtual bool flushGraphicsState(const GrOptDrawState&) = 0;
 
     // clears target's entire stencil buffer to 0
     virtual void clearStencil(GrRenderTarget* target) = 0;