Print Preview: Hook up the print button to initiate printing without displaying a print dialog.

printing/printing_context_cairo.cc

Index: printing/printing_context_cairo.cc
diff --git a/printing/printing_context_cairo.cc b/printing/printing_context_cairo.cc
index d0110b17098d3f3bec66020b09d4924a6a1d0da3..d7e1f273bf227915a39f34919e0d513a8eff470f 100644
--- a/printing/printing_context_cairo.cc
+++ b/printing/printing_context_cairo.cc
@@ -149,6 +149,17 @@ PrintingContext::Result PrintingContextCairo::UseDefaultSettings() {
   return OK;
 }
 
+PrintingContext::Result PrintingContextCairo::UpdatePrintSettings(
+    const PageRanges& ranges) {
+  DCHECK(!in_print_job_);
+
+  settings_.ranges = ranges;
+
+  NOTIMPLEMENTED();
+
+  return FAILED;
+}
+
 PrintingContext::Result PrintingContextCairo::InitWithSettings(
     const PrintSettings& settings) {
   DCHECK(!in_print_job_);