Add 'priority' key to CSSProperties.in

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

Index: third_party/WebKit/Source/build/scripts/css_properties.py
diff --git a/third_party/WebKit/Source/build/scripts/css_properties.py b/third_party/WebKit/Source/build/scripts/css_properties.py
index e2015500bbda2b7e01bd2eb0e91e28829791579a..41d1a11f94d88c2067914f6639d549d48e2388ae 100755
--- a/third_party/WebKit/Source/build/scripts/css_properties.py
+++ b/third_party/WebKit/Source/build/scripts/css_properties.py
@@ -31,6 +31,7 @@ class CSSProperties(in_generator.Writer):
         'custom_value': False,
         'builder_skip': False,
         'direction_aware': False,
+        'priority': 2,
         'api_class': None,
         # Generated ComputedStyle annotations.
         'field_storage_type': None,
@@ -62,6 +63,20 @@ class CSSProperties(in_generator.Writer):
         in_generator.Writer.__init__(self, file_paths)
 
         properties = self.in_file.name_dictionaries
+
+        # Group properties by priority.
+        prioritised_properties = {0: [], 1: [], 2: []}

[ktyliu, 2017/01/11 02:45:43]

Note you can do this all in one statement by using sorting based on tuple:

# Sort by priority and then by stripped name.
propertie.sort(key = lambda p: (p.priority,
name_utilities.strip_webkit_prefix(p['name']))

[sashab, 2017/01/11 02:50:46]

"Let me do your entire patch in one line kthxbai"

;) Nice one!!!!

+        for property in properties:
+            priority = int(property['priority'])
+            assert priority in [0, 1, 2], 'Priority must be a number between 0 and 2'
+            prioritised_properties[priority].append(property)
+
+        # Sort each priority alphabetically and concatenate them.
+        property_name_key = lambda p: name_utilities.strip_webkit_prefix(p['name'])
+        properties = (sorted(prioritised_properties[0], key=property_name_key) +
+                      sorted(prioritised_properties[1], key=property_name_key) +
+                      sorted(prioritised_properties[2], key=property_name_key))
+
         self._aliases = [property for property in properties if property['alias_for']]
         properties = [property for property in properties if not property['alias_for']]