Add a "Simplify Page" option to the print preview dialog

components/dom_distiller/core/viewer.h

Index: components/dom_distiller/core/viewer.h
diff --git a/components/dom_distiller/core/viewer.h b/components/dom_distiller/core/viewer.h
index 7b9261f5043ac5ddd83037e078222143bab49a09..3fa4f5655127ea3a1811045daee777af3fe014e4 100644
--- a/components/dom_distiller/core/viewer.h
+++ b/components/dom_distiller/core/viewer.h
@@ -68,6 +68,9 @@ const std::string GetErrorPageHtml(
 // Returns the default CSS to be used for a viewer.
 const std::string GetCss();
 
+// Returns the default CSS to be used for a print preview viewer.
+const std::string GetPrintPreviewCss();
+
 // Returns the default JS to be used for a viewer.
 const std::string GetJavaScript();
 
@@ -86,6 +89,10 @@ const std::string GetDistilledPageFontFamilyJs(
 // Returns JavaScript corresponding to setting a specific theme.
 const std::string GetDistilledPageThemeJs(DistilledPagePrefs::Theme theme);
 
+const std::string GetUnsafePrintPreviewHtml(
+    const DistilledArticleProto* article_proto,
+    const DistilledPagePrefs::Theme theme,
+    const DistilledPagePrefs::FontFamily font_family);
 }  // namespace viewer
 
 }  // namespace dom_distiller