Cache render targets that render to wrapped textures

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 cb7611246af88da3554a0b6e4e38223cb4cd69b6..373fcd6971b9984f410f00e49381e142f285e5a0 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -142,6 +142,10 @@ private:
     GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&, GrWrapOwnership) override;
     GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&,
                                               GrWrapOwnership) override;
+    void onComputeBackendTextureKeyForWrapAsRenderTarget(const GrBackendTextureDesc&,
+                                                         GrUniqueKey*) override;
+    bool onRewrapRenderTargetWithBackendTexture(const GrBackendTextureDesc&,
+                                                GrRenderTarget*) override;
     GrRenderTarget* onWrapBackendTextureAsRenderTarget(const GrBackendTextureDesc&) override;
     // Given a GrPixelConfig return the index into the stencil format array on GrGLCaps to a
     // compatible stencil format, or negative if there is no compatible stencil format.