Add quiet safe browsing interstitial for WebView

components/security_interstitials/core/browser/resources/interstitial_common.js

Index: components/security_interstitials/core/browser/resources/interstitial_common.js
diff --git a/components/security_interstitials/core/browser/resources/interstitial_common.js b/components/security_interstitials/core/browser/resources/interstitial_common.js
new file mode 100644
index 0000000000000000000000000000000000000000..e826a1490757fcab3ba033fed3c017dfdcd409ee
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+++ b/components/security_interstitials/core/browser/resources/interstitial_common.js
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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This is the shared code for security interstitials. It is used for both SSL
+// interstitials and Safe Browsing interstitials.
+
+// Should match security_interstitials::SecurityInterstitialCommands
+/** @enum| {string} */
+var SecurityInterstitialCommandId = {
+  CMD_DONT_PROCEED: 0,
+  CMD_PROCEED: 1,
+  // Ways for user to get more information
+  CMD_SHOW_MORE_SECTION: 2,
+  CMD_OPEN_HELP_CENTER: 3,
+  CMD_OPEN_DIAGNOSTIC: 4,
+  // Primary button actions
+  CMD_RELOAD: 5,
+  CMD_OPEN_DATE_SETTINGS: 6,
+  CMD_OPEN_LOGIN: 7,
+  // Safe Browsing Extended Reporting
+  CMD_DO_REPORT: 8,
+  CMD_DONT_REPORT: 9,
+  CMD_OPEN_REPORTING_PRIVACY: 10,
+  CMD_OPEN_WHITEPAPER: 11,
+  // Report a phishing error.
+  CMD_REPORT_PHISHING_ERROR: 12
+};
+
+/**
+ * A convenience method for sending commands to the parent page.
+ * @param {string} cmd  The command to send.
+ */
+function sendCommand(cmd) {
+// <if expr="not is_ios">
+  window.domAutomationController.setAutomationId(1);
+  window.domAutomationController.send(cmd);
+// </if>
+// <if expr="is_ios">
+  // TODO(crbug.com/565877): Revisit message passing for WKWebView.
+  var iframe = document.createElement('IFRAME');
+  iframe.setAttribute('src', 'js-command:' + cmd);
+  document.documentElement.appendChild(iframe);
+  iframe.parentNode.removeChild(iframe);
+// </if>
+}