fix up GrImmediateDrawTarget.cpp

src/gpu/GrImmediateDrawTarget.cpp

Index: src/gpu/GrImmediateDrawTarget.cpp
diff --git a/src/gpu/GrImmediateDrawTarget.cpp b/src/gpu/GrImmediateDrawTarget.cpp
index 2b72bae9b8769ccb35e0966a46cf04e1685100ec..0c4210ad705280cb94dbc4f1c2ce49ed825f485b 100644
--- a/src/gpu/GrImmediateDrawTarget.cpp
+++ b/src/gpu/GrImmediateDrawTarget.cpp
@@ -52,6 +52,13 @@ void GrImmediateDrawTarget::onClear(const SkIRect* rect, GrColor color,
     this->getGpu()->clear(rect, color, canIgnoreRect, renderTarget);
 }
 
+void GrImmediateDrawTarget::onCopySurface(GrSurface* dst,
+                                          GrSurface* src,
+                                          const SkIRect& srcRect,
+                                          const SkIPoint& dstPoint) {
+    this->getGpu()->copySurface(dst, src, srcRect, dstPoint);
+}
+
 void GrImmediateDrawTarget::clearStencilClip(const SkIRect& rect,
                                              bool insideClip,
                                              GrRenderTarget* renderTarget) {