[Typed OM] Add CSSValue -> CSSNumberValue conversion

third_party/WebKit/Source/build/scripts/make_cssom_types.py

Index: third_party/WebKit/Source/build/scripts/make_cssom_types.py
diff --git a/third_party/WebKit/Source/build/scripts/make_cssom_types.py b/third_party/WebKit/Source/build/scripts/make_cssom_types.py
index ee57c747ad5afd23d0b43b66c68b4b95296a3db4..d62cbcb759972a2053c30142c2dc4e319ff18c02 100755
--- a/third_party/WebKit/Source/build/scripts/make_cssom_types.py
+++ b/third_party/WebKit/Source/build/scripts/make_cssom_types.py
@@ -11,6 +11,18 @@ from name_utilities import enum_for_css_keyword
 import template_expander
 
 
+def number_metadata(number_type):
+    result = {}
+    result['integer'] = 'false'
+    result['allow_negative'] = 'true'
+    if number_type == 'Integer' or number_type == 'PositiveInteger':
+        result['integer'] = 'true'
+    if (number_type == 'PositiveInteger' or
+            number_type == 'PositiveNumber'):
+        result['allow_negative'] = 'false'
+    return result
+
+
 class CSSOMTypesWriter(css_properties.CSSProperties):
     def __init__(self, in_file_path):
         super(CSSOMTypesWriter, self).__init__(in_file_path)
@@ -24,6 +36,13 @@ class CSSOMTypesWriter(css_properties.CSSProperties):
                     types.append('CalcLength')
                 elif singleType == 'Image':
                     types.append('URLImage')
+                elif (singleType == 'Integer' or
+                      singleType == 'PositiveInteger' or
+                      singleType == 'PositiveNumber' or
+                      singleType == 'Number'):
+                    # Numbers are a special case since they
+                    # require further validation.
+                    property['number_metadata'] = number_metadata(singleType)
                 else:
                     types.append(singleType)
             property['typedom_types'] = types