Stop generating a parser.out file in the source.

.gitignore

@@ -24,5 +24,4 @@
 servo-test
 Servo.app
 .config.mk.last
-parser.out
 /glfw

components/script/dom/bindings/codegen/parser/WebIDL.py

@@ -6438,7 +6438,8 @@ class Parser(Tokenizer):
         self.parser = yacc.yacc(module=self,
                                 outputdir=outputdir,
                                 tabmodule='webidlyacc',
-                                errorlog=logger
+                                errorlog=logger,
+                                debug=False
                                 # Pickling the grammar is a speedup in
                                 # some cases (older Python?) but a
                                 # significant slowdown in others.

components/script/dom/bindings/codegen/parser/debug.patch

@@ -0,0 +1,12 @@
+--- WebIDL.py
++++ WebIDL.py
+@@ -6438,7 +6438,8 @@ class Parser(Tokenizer):
+         self.parser = yacc.yacc(module=self,
+                                 outputdir=outputdir,
+                                 tabmodule='webidlyacc',
+-                                errorlog=logger
++                                errorlog=logger,
++                                debug=False
+                                 # Pickling the grammar is a speedup in
+                                 # some cases (older Python?) but a
+                                 # significant slowdown in others.

components/script/dom/bindings/codegen/parser/update.sh

@@ -1,5 +1,6 @@
 wget https://mxr.mozilla.org/mozilla-central/source/dom/bindings/parser/WebIDL.py?raw=1 -O WebIDL.py
 patch < abstract.patch
+patch < debug.patch
 patch < legacy-unenumerable-named-properties.patch
 
 # TODO: update test files from https://dxr.mozilla.org/mozilla-central/source/dom/bindings/parser/tests