Support FrozenArray in idl_parser.py

Spec: http://heycam.github.io/webidl/#idl-frozen-array
Almost the same as sequence<T>.

BUG=515920

Review URL: https://codereview.chromium.org/1295083004

Cr-Commit-Position: refs/heads/master@{#344129}

3 files changed, 17 insertions, 2 deletions

diff --git a/tools/idl_parser/idl_lexer.py b/tools/idl_parser/idl_lexer.py
index abbed37..1f186d7 100755
--- a/tools/idl_parser/idl_lexer.py
+++ b/tools/idl_parser/idl_lexer.py
@@ -80,6 +80,7 @@ class IDLLexer(object):
     'exception' : 'EXCEPTION',
     'false' : 'FALSE',
     'float' : 'FLOAT',
+    'FrozenArray' : 'FROZENARRAY',
     'getter': 'GETTER',
     'implements' : 'IMPLEMENTS',
     'Infinity' : 'INFINITY',
diff --git a/tools/idl_parser/idl_parser.py b/tools/idl_parser/idl_parser.py
index f8e509f..3dc2b53 100755
--- a/tools/idl_parser/idl_parser.py
+++ b/tools/idl_parser/idl_parser.py
@@ -886,7 +886,8 @@ class IDLParser(object):
     """NonAnyType : PrimitiveType TypeSuffix
                   | PromiseType Null
                   | identifier TypeSuffix
-                  | SEQUENCE '<' Type '>' Null"""
+                  | SEQUENCE '<' Type '>' Null
+                  | FROZENARRAY '<' Type '>' Null"""
     if len(p) == 3:
       if type(p[1]) == str:
         typeref = self.BuildNamed('Typeref', p, 1)
@@ -895,7 +896,8 @@ class IDLParser(object):
       p[0] = ListFromConcat(typeref, p[2])
 
     if len(p) == 6:
-      p[0] = self.BuildProduction('Sequence', p, 1, ListFromConcat(p[3], p[5]))
+      cls = 'Sequence' if p[1] == 'sequence' else 'FrozenArray'
+      p[0] = self.BuildProduction(cls, p, 1, ListFromConcat(p[3], p[5]))
 
   # [79] NOT IMPLEMENTED (BufferRelatedType)
 
diff --git a/tools/idl_parser/test_parser/interface_web.idl b/tools/idl_parser/test_parser/interface_web.idl
index 90b0e83..a2c9ae6 100644
--- a/tools/idl_parser/test_parser/interface_web.idl
+++ b/tools/idl_parser/test_parser/interface_web.idl
@@ -369,3 +369,15 @@ interface MyIfaceSerializer {
   serializer = [getter];
   serializer = [name1, name2];
 };
+
+/* TREE
+ *Interface(MyIfaceFrozenArray)
+ *  Attribute(foo)
+ *    Type()
+ *      FrozenArray()
+ *        Type()
+ *          PrimitiveType(DOMString)
+ */
+interface MyIfaceFrozenArray {
+  readonly attribute FrozenArray<DOMString> foo;
+};