diff --git a/components/style/gecko/regen_atoms.py b/components/style/gecko/regen_atoms.py
index 9f9a353c629..2cb754f7e5b 100755
--- a/components/style/gecko/regen_atoms.py
+++ b/components/style/gecko/regen_atoms.py
@@ -20,34 +20,28 @@ PRELUDE = """
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-/* Autogenerated file created by components/style/gecko/binding_tools/regen_atoms.py, DO NOT EDIT DIRECTLY */
+/* Autogenerated file created by components/style/gecko/regen_atoms.py, DO NOT EDIT DIRECTLY */
 """[1:]   # NOQA: E501
 
 
-def gnu_symbolify(source, ident):
-    return "_ZN{}{}{}{}E".format(len(source.CLASS), source.CLASS, len(ident), ident)
+PATTERN = re.compile('^GK_ATOM\(([^,]*),[^"]*"([^"]*)",\s*([^,]*),\s*([^)]*)\)',
+                     re.MULTILINE)
+FILE = "include/nsGkAtomList.h"
+CLASS = "nsGkAtoms"
 
 
-def msvc64_symbolify(source, ident, ty):
-    return "?{}@{}@@2PEAV{}@@EA".format(ident, source.CLASS, ty)
+def gnu_symbolify(ident):
+    return "_ZN{}{}{}{}E".format(len(CLASS), CLASS, len(ident), ident)
 
 
-def msvc32_symbolify(source, ident, ty):
+def msvc64_symbolify(ident, ty):
+    return "?{}@{}@@2PEAV{}@@EA".format(ident, CLASS, ty)
+
+
+def msvc32_symbolify(ident, ty):
     # Prepend "\x01" to avoid LLVM prefixing the mangled name with "_".
     # See https://github.com/rust-lang/rust/issues/36097
-    return "\\x01?{}@{}@@2PAV{}@@A".format(ident, source.CLASS, ty)
-
-
-class GkAtomSource:
-    PATTERN = re.compile('^GK_ATOM\(([^,]*),[^"]*"([^"]*)",\s*([^,]*),\s*([^)]*)\)',
-                         re.MULTILINE)
-    FILE = "include/nsGkAtomList.h"
-    CLASS = "nsGkAtoms"
-
-
-SOURCES = [
-    GkAtomSource,
-]
+    return "\\x01?{}@{}@@2PAV{}@@A".format(ident, CLASS, ty)
 
 
 def map_atom(ident):
@@ -58,11 +52,10 @@ def map_atom(ident):
 
 
 class Atom:
-    def __init__(self, source, ident, value, ty, atom_type):
-        self.ident = "{}_{}".format(source.CLASS, ident)
+    def __init__(self, ident, value, ty, atom_type):
+        self.ident = "{}_{}".format(CLASS, ident)
         self.original_ident = ident
         self.value = value
-        self.source = source
         # The Gecko type: "nsStaticAtom", "nsICSSPseudoElement", or "nsIAnonBoxPseudo"
         self.ty = ty
         # The type of atom: "Atom", "PseudoElement", "NonInheritingAnonBox",
@@ -73,17 +66,14 @@ class Atom:
         if self.is_anon_box():
             assert self.is_inheriting_anon_box() or self.is_non_inheriting_anon_box()
 
-    def cpp_class(self):
-        return self.source.CLASS
-
     def gnu_symbol(self):
-        return gnu_symbolify(self.source, self.original_ident)
+        return gnu_symbolify(self.original_ident)
 
     def msvc32_symbol(self):
-        return msvc32_symbolify(self.source, self.original_ident, self.ty)
+        return msvc32_symbolify(self.original_ident, self.ty)
 
     def msvc64_symbol(self):
-        return msvc64_symbolify(self.source, self.original_ident, self.ty)
+        return msvc64_symbolify(self.original_ident, self.ty)
 
     def type(self):
         return self.ty
@@ -109,13 +99,12 @@ class Atom:
 
 def collect_atoms(objdir):
     atoms = []
-    for source in SOURCES:
-        path = os.path.abspath(os.path.join(objdir, source.FILE))
-        print("cargo:rerun-if-changed={}".format(path))
-        with open(path) as f:
-            content = f.read()
-            for result in source.PATTERN.finditer(content):
-                atoms.append(Atom(source, result.group(1), result.group(2), result.group(3), result.group(4)))
+    path = os.path.abspath(os.path.join(objdir, FILE))
+    print("cargo:rerun-if-changed={}".format(path))
+    with open(path) as f:
+        content = f.read()
+        for result in PATTERN.finditer(content):
+            atoms.append(Atom(result.group(1), result.group(2), result.group(3), result.group(4)))
     return atoms