Make PageSizeType an enum class.

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 2411 matching lines @@
                                           DoubleSize& page_size,
                                           int& margin_top,
                                           int& margin_right,
                                           int& margin_bottom,
                                           int& margin_left) {
   RefPtr<ComputedStyle> style = StyleForPage(page_index);
 
   double width = page_size.Width();
   double height = page_size.Height();
   switch (style->GetPageSizeType()) {
-    case PAGE_SIZE_AUTO:
+    case PageSizeType::kAuto:
       break;
-    case PAGE_SIZE_AUTO_LANDSCAPE:
+    case PageSizeType::kLandscape:
       if (width < height)
         std::swap(width, height);
       break;
-    case PAGE_SIZE_AUTO_PORTRAIT:
+    case PageSizeType::kPortrait:
       if (width > height)
         std::swap(width, height);
       break;
-    case PAGE_SIZE_RESOLVED: {
+    case PageSizeType::kResolved: {
       FloatSize size = style->PageSize();
       width = size.Width();
       height = size.Height();
       break;
     }
     default:
       NOTREACHED();
   }
   page_size = DoubleSize(width, height);
 
@@ skipping 4397 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (blink::Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->Url().GetString().Utf8().data());
 }
 #endif