Add Print Selection support to Chrome. This change is fairly involved since ...

chrome/browser/printing/page_range.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/printing/page_range.h"
 
 #include "base/stl_util-inl.h"
 
 namespace printing {
 
+/* static */
 std::vector<int> PageRange::GetPages(const PageRanges& ranges) {
   std::set<int> pages;
   for (unsigned i = 0; i < ranges.size(); ++i) {
     const PageRange& range = ranges[i];
     // Ranges are inclusive.
     for (int i = range.from; i <= range.to; ++i) {
       pages.insert(i);
     }
   }
   return SetToVector(pages);
 }
 
+/* static */
+int PageRange::GetTotalPages(const PageRanges& ranges) {
+  // Since ranges can overlap we need to merge them before counting
+  std::vector<int> pages = PageRange::GetPages(ranges);
+  return pages.size();
+}
+
 }  // namespace printing