Move JavaScript to root lib/ folder

lib/browser/api/protocol.js

@@ -0,0 +1,31 @@
+const app = require('electron').app;
+
+if (!app.isReady()) {
+  throw new Error('Can not initialize protocol module before app is ready');
+}
+
+const protocol = process.atomBinding('protocol').protocol;
+
+// Warn about removed APIs.
+var logAndThrow = function(callback, message) {
+  console.error(message);
+  if (callback) {
+    return callback(new Error(message));
+  } else {
+    throw new Error(message);
+  }
+};
+
+protocol.registerProtocol = function(scheme, handler, callback) {
+  return logAndThrow(callback, 'registerProtocol API has been replaced by the register[File/Http/Buffer/String]Protocol API family, please switch to the new APIs.');
+};
+
+protocol.isHandledProtocol = function(scheme, callback) {
+  return logAndThrow(callback, 'isHandledProtocol API has been replaced by isProtocolHandled.');
+};
+
+protocol.interceptProtocol = function(scheme, handler, callback) {
+  return logAndThrow(callback, 'interceptProtocol API has been replaced by the intercept[File/Http/Buffer/String]Protocol API family, please switch to the new APIs.');
+};
+
+module.exports = protocol;