Merge .in files for css/svg properties into a single file

Source/devtools/scripts/generate_supported_css.py

Index: Source/devtools/scripts/generate_supported_css.py
diff --git a/Source/devtools/scripts/generate_supported_css.py b/Source/devtools/scripts/generate_supported_css.py
index 2883c943332d2495aa4524c54279cd215a7ae724..a99e3140132dbd14ef7099e741e4464f78276e73 100755
--- a/Source/devtools/scripts/generate_supported_css.py
+++ b/Source/devtools/scripts/generate_supported_css.py
@@ -34,51 +34,22 @@ except ImportError:
 
 import sys
 
-cssProperties = {}
 
-
-def filterCommentsAndEmptyLines(lines):
-    result = []
-    for line in lines:
-        if len(line.strip()) > 0 and line[:2] != "//":
-            result.append(line.strip())
-    return result
-
-
-def fillPropertiesFromFile(fileName):
-    with open(fileName, "r") as f:
-        lines = f.readlines()
-    lines = filterCommentsAndEmptyLines(lines)
-    for line in lines:
-        if not "alias_for" in line:
-            cssProperties[line] = []
-
-
-def fillCSSShorthandsFromFile(fileName):
-    with open(fileName, "r") as f:
-        lines = f.readlines()
-    lines = filterCommentsAndEmptyLines(lines)
-    for line in lines:
-        # Every line is:
-        #  <property-name>[ longhands=<longhand 1>;<longhand 2>;<longhand 3>,runtimeEnabledShorthand=<runtime flag name>]
-        # There might be a runtime flag declaration at the end of the list followed by a comma.
-        if "," in line:
-            line = line[:line.index(",")]
-        shorthand = line[:line.index(" ")]
-        longhands = line[line.index("=") + 1:].split(";")
-        cssProperties[shorthand] = longhands
-
-fillPropertiesFromFile(sys.argv[1])
-fillPropertiesFromFile(sys.argv[2])
-fillCSSShorthandsFromFile(sys.argv[3])
-
-# Reformat from map into list.
-reformat = []
-for name, longhands in cssProperties.items():
-    entry = {"name": name}
-    if len(longhands) > 0:
-        entry["longhands"] = longhands
-    reformat.append(entry)
-
-with open(sys.argv[4], "w") as f:
-    f.write("WebInspector.CSSMetadata.initializeWithSupportedProperties(%s);" % json.dumps(reformat))
+def properties_from_file(file_name):
+    properties = []
+    with open(file_name, "r") as f:
+        for line in f:
+            line = line.strip()
+            if not line or line.startswith("//") or "alias_for" in line:
+                continue
+            name = line.partition(" ")[0]
+            entry = {"name": name}
+            longhands = line.partition("longhands=")[2]
+            if longhands:
+                entry["longhands"] = longhands.split(";")
+            properties.append(entry)
+    return properties
+
+properties = properties_from_file(sys.argv[1])
+with open(sys.argv[2], "w") as f:
+    f.write("WebInspector.CSSMetadata.initializeWithSupportedProperties(%s);" % json.dumps(properties))