[linter] Warn on console.* and debugger statements

addon/tern/tern.js

@@ -176,7 +176,7 @@
 
   function sendDoc(ts, doc) {
     ts.server.request({files: [{type: "full", name: doc.name, text: docValue(ts, doc)}]}, function(error) {
-      if (error) console.error(error);
+      if (error) window.console.error(error);
       else doc.changed = null;
     });
   }
@@ -642,7 +642,7 @@
           send({type: "getFile", err: String(err), text: text, id: data.id});
         });
       } else if (data.type == "debug") {
-        console.log(data.message);
+        window.console.log(data.message);
       } else if (data.id && pending[data.id]) {
         pending[data.id](data.err, data.body);
         delete pending[data.id];

test/lint/lint.js

@@ -99,6 +99,13 @@ function checkFile(fileName) {
     },
     ForStatement: function(node) {
       checkReusedIndex(node);
+    },
+    MemberExpression: function(node) {
+      if (node.object.type == "Identifier" && node.object.name == "console" && !node.computed)
+        fail("Found console." + node.property.name, node.loc);
+    },
+    DebuggerStatement: function(node) {
+      fail("Found debugger statement", node.loc);
     }
   }, scopePasser);