Add DLP quickstart + fix incorrect comments (#442)

* Fix typo in comments

* Add DLP quickstart

* Address comments

packages/google-privacy-dlp/samples/quickstart.js

@@ -0,0 +1,77 @@
+/**
+ * Copyright 2017, Google, Inc.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+// [START quickstart]
+// Imports the Google Cloud Data Loss Prevention library
+const DLP = require('@google-cloud/dlp');
+
+// Instantiates a client
+const dlp = DLP();
+
+// The string to inspect
+const string = 'Robert Frost';
+
+// The minimum likelihood required before returning a match
+const minLikelihood = 'LIKELIHOOD_UNSPECIFIED';
+
+// The maximum number of findings to report (0 = server maximum)
+const maxFindings = 0;
+
+// The infoTypes of information to match
+const infoTypes = [
+  { name: 'US_MALE_NAME' },
+  { name: 'US_FEMALE_NAME' }
+];
+
+// Whether to include the matching string
+const includeQuote = true;
+
+// Construct items to inspect
+const items = [{ type: 'text/plain', value: string }];
+
+// Construct request
+const request = {
+  inspectConfig: {
+    infoTypes: infoTypes,
+    minLikelihood: minLikelihood,
+    maxFindings: maxFindings,
+    includeQuote: includeQuote
+  },
+  items: items
+};
+
+// Run request
+dlp.inspectContent(request)
+  .then((response) => {
+    const findings = response[0].results[0].findings;
+    if (findings.length > 0) {
+      console.log(`Findings:`);
+      findings.forEach((finding) => {
+        if (includeQuote) {
+          console.log(`\tQuote: ${finding.quote}`);
+        }
+        console.log(`\tInfo type: ${finding.infoType.name}`);
+        console.log(`\tLikelihood: ${finding.likelihood}`);
+      });
+    } else {
+      console.log(`No findings.`);
+    }
+  })
+  .catch((err) => {
+    console.error(`Error in inspectString: ${err.message || err}`);
+  });
+// [END quickstart]