Fix for copy surface not handling dirty context

src/gpu/gl/GrGLGpu.h

Index: src/gpu/gl/GrGLGpu.h
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index 5d806a7426435d4881f602f80e67c219f1885717..defb81a3820d4b3b49abd02ebd87fcb04957b362 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -91,11 +91,6 @@ public:
         fHWGeometryState.notifyIndexBufferDelete(id);
     }
 
-    bool copySurface(GrSurface* dst,
-                     GrSurface* src,
-                     const SkIRect& srcRect,
-                     const SkIPoint& dstPoint) override;
-
     void buildProgramDesc(GrProgramDesc*,
                           const GrPrimitiveProcessor&,
                           const GrPipeline&,
@@ -152,6 +147,11 @@ private:
 
     void onDraw(const DrawArgs&, const GrNonInstancedVertices&) override;
 
+    bool onCopySurface(GrSurface* dst,
+                       GrSurface* src,
+                       const SkIRect& srcRect,
+                       const SkIPoint& dstPoint) override;
+
     void clearStencil(GrRenderTarget*) override;
 
     // GrDrawTarget overrides