Mojo: add support for {double,float}.{INFINITY,NEGATIVE_INFINITY,NAN}

mojo/public/tools/bindings/pylib/mojom_tests/parse/lexer_unittest.py

Index: mojo/public/tools/bindings/pylib/mojom_tests/parse/lexer_unittest.py
diff --git a/mojo/public/tools/bindings/pylib/mojom_tests/parse/lexer_unittest.py b/mojo/public/tools/bindings/pylib/mojom_tests/parse/lexer_unittest.py
index 49dc77e477da39d1daa35b420edfcbe39652c2e4..e5f3912e4827632d069ea4370a04d76a5f22c159 100644
--- a/mojo/public/tools/bindings/pylib/mojom_tests/parse/lexer_unittest.py
+++ b/mojo/public/tools/bindings/pylib/mojom_tests/parse/lexer_unittest.py
@@ -124,6 +124,14 @@ class LexerTest(unittest.TestCase):
                       _MakeLexToken("INT_CONST_HEX", "0x01aB2eF3"))
     self.assertEquals(self._SingleTokenForInput("123.456"),
                       _MakeLexToken("FLOAT_CONST", "123.456"))
+    self.assertEquals(self._SingleTokenForInput("Inf"),
+                      _MakeLexToken("FLOAT_CONST", "Inf"))
+    self.assertEquals(self._SingleTokenForInput("+Inf"),
+                      _MakeLexToken("FLOAT_CONST", "+Inf"))
+    self.assertEquals(self._SingleTokenForInput("-Inf"),
+                      _MakeLexToken("FLOAT_CONST", "-Inf"))
+    self.assertEquals(self._SingleTokenForInput("NaN"),
+                      _MakeLexToken("FLOAT_CONST", "NaN"))
     self.assertEquals(self._SingleTokenForInput("\"hello\""),
                       _MakeLexToken("STRING_LITERAL", "\"hello\""))
     self.assertEquals(self._SingleTokenForInput("+"),