Add logic to GLRenderer to support RenderPassDrawQuad copying.

cc/output/software_renderer.cc

Index: cc/output/software_renderer.cc
diff --git a/cc/output/software_renderer.cc b/cc/output/software_renderer.cc
index 48e2d4f948bb977a01c281ce0731fbd507d415df..f15228599d54725a41a0e1cc7a056727ef853d80 100644
--- a/cc/output/software_renderer.cc
+++ b/cc/output/software_renderer.cc
@@ -757,4 +757,20 @@ sk_sp<SkShader> SoftwareRenderer::GetBackgroundFilterShader(
                                            &filter_backdrop_transform);
 }
 
+bool SoftwareRenderer::CopyRenderPassDrawQuadToIOSurface(
+    const RenderPassDrawQuad* quad,
+    ResourceId* resource_id) {
+  NOTREACHED();
+  return false;
+}
+
+void SoftwareRenderer::ReleaseIOSurfaces(
+    const std::vector<ResourceId>& resources) {
+  NOTREACHED();
+}
+
+void SoftwareRenderer::UpdateCopyCountForFrame(size_t count) {
+  NOTREACHED();
+}
+
 }  // namespace cc