Avoid using |console| in default tracer and its tests when not defined

This makes default tracer and its tests work in IE 8-10.

lib/compiler/passes/generate-javascript.js

@@ -817,12 +817,14 @@ function generateJavascript(ast, options) {
       '        return string + repeat(" ", length - string.length);',
       '      }',
       '',
-      '      console.log(',
-      '        event.location.start.line + ":" + event.location.start.column + "-"',
-      '          + event.location.end.line + ":" + event.location.end.column + " "',
-      '          + pad(event.type, 10) + " "',
-      '          + repeat("  ", that.indentLevel) + event.rule',
-      '      );',
+      '      if (typeof console === "object") {',   // IE 8-10
+      '        console.log(',
+      '          event.location.start.line + ":" + event.location.start.column + "-"',
+      '            + event.location.end.line + ":" + event.location.end.column + " "',
+      '            + pad(event.type, 10) + " "',
+      '            + repeat("  ", that.indentLevel) + event.rule',
+      '        );',
+      '      }',
       '    }',
       '',
       '    switch (event.type) {',

spec/api/generated-parser-api.spec.js

@@ -53,17 +53,21 @@ describe("generated parser API", function() {
           ].join("\n"), { trace: true });
 
       describe("default tracer", function() {
-        it("traces using console.log", function() {
-          spyOn(console, "log");
+        it("traces using console.log (if console is defined)", function() {
+          if (typeof console === "object") {
+            spyOn(console, "log");
+          }
 
           parser.parse("b");
 
-          expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.enter start");
-          expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.enter   a");
-          expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.fail    a");
-          expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.enter   b");
-          expect(console.log).toHaveBeenCalledWith("1:1-1:2 rule.match   b");
-          expect(console.log).toHaveBeenCalledWith("1:1-1:2 rule.match start");
+          if (typeof console === "object") {
+            expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.enter start");
+            expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.enter   a");
+            expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.fail    a");
+            expect(console.log).toHaveBeenCalledWith("1:1-1:1 rule.enter   b");
+            expect(console.log).toHaveBeenCalledWith("1:1-1:2 rule.match   b");
+            expect(console.log).toHaveBeenCalledWith("1:1-1:2 rule.match start");
+          }
         });
       });