Printing: Remove the debug-only |page_number_| from PrintingContext, which has

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 d82f6260fabf109537d2f5650a7c1cbb546f3d18..86de49caaa0465aed7ac87ac624e77c4017d7cc3 100644
--- a/printing/printing_context_cairo.cc
+++ b/printing/printing_context_cairo.cc
@@ -13,9 +13,6 @@ namespace printing {
 
 PrintingContext::PrintingContext()
     :
-#ifndef NDEBUG
-      page_number_(-1),
-#endif
       dialog_box_dismissed_(false),
       in_print_job_(false),
       abort_printing_(false) {
@@ -66,9 +63,6 @@ PrintingContext::Result PrintingContext::InitWithSettings(
 }
 
 void PrintingContext::ResetSettings() {
-#ifndef NDEBUG
-  page_number_ = -1;
-#endif
   dialog_box_dismissed_ = false;
   abort_printing_ = false;
   in_print_job_ = false;
@@ -80,10 +74,6 @@ PrintingContext::Result PrintingContext::NewDocument(
 
   NOTIMPLEMENTED();
 
-#ifndef NDEBUG
-  page_number_ = 0;
-#endif
-
   return FAILED;
 }
 
@@ -94,10 +84,6 @@ PrintingContext::Result PrintingContext::NewPage() {
 
   NOTIMPLEMENTED();
 
-#ifndef NDEBUG
-  ++page_number_;
-#endif
-
   return FAILED;
 }