Make PageSizeType an enum class.

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

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 4f428b56ad24d5b1e19a8efa7d18ff9c1309022d..ccd9ac75e34a599aa700678b2c043c81f18c388d 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -2429,17 +2429,17 @@ void Document::PageSizeAndMarginsInPixels(int 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();