Turn on enforce-in-pdf Clang plugin flag.

pdf/pdf_engine.h

Index: pdf/pdf_engine.h
diff --git a/pdf/pdf_engine.h b/pdf/pdf_engine.h
index c479ed7546b466d4ea23227d52d170b06ee0a3a8..a44a4b97c9ba4afaeadde85c48b49d46fe504f3d 100644
--- a/pdf/pdf_engine.h
+++ b/pdf/pdf_engine.h
@@ -305,12 +305,9 @@ class PDFEngineExports {
                       bool stretch_to_bounds,
                       bool keep_aspect_ratio,
                       bool center_in_bounds,
-                      bool autorotate)
-        : dpi_x(dpi_x), dpi_y(dpi_y), bounds(bounds),
-        fit_to_bounds(fit_to_bounds), stretch_to_bounds(stretch_to_bounds),
-        keep_aspect_ratio(keep_aspect_ratio),
-        center_in_bounds(center_in_bounds), autorotate(autorotate) {
-    }
+                      bool autorotate);
+    RenderingSettings(const RenderingSettings& that);
+
     int dpi_x;
     int dpi_y;
     pp::Rect bounds;