Move stringify, form, navigation and scroll methods out of core.js.

ios/web/web_state/js/resources/form.js

+// 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.
+
+/**
+ * @fileoverview Adds listeners that are used to handle forms, enabling autofill
+ * and the replacement method to dismiss the keyboard needed because of the
+ * Autofill keyboard accessory.
+ */
+
+goog.provide('__crWeb.form');
+
+goog.require('__crWeb.message');
+
+/** Beginning of anonymous object */
+(function() {
+
+  /**
+   * Focus and input events for form elements are messaged to the main
+   * application for broadcast to CRWWebControllerObservers.
+   * This is done with a single event handler for each type being added to the
+   * main document element which checks the source element of the event; this
+   * is much easier to manage than adding handlers to individual elements.
+   * @private
+   */
+  var formActivity_ = function(evt) {
+    var srcElement = evt.srcElement;
+    var fieldName = srcElement.name || '';
+    var value = srcElement.value || '';
+
+    var msg = {
+      'command': 'form.activity',
+      'formName': __gCrWeb.common.getFormIdentifier(evt.srcElement.form),
+      'fieldName': fieldName,
+      'type': evt.type,
+      'value': value
+    };
+    __gCrWeb.message.invokeOnHost(msg);
+  };
+
+  /**
+   * Focus events performed on the 'capture' phase otherwise they are often
+   * not received.
+   */
+  document.addEventListener('focus', formActivity_, true);
+  document.addEventListener('blur', formActivity_, true);
+  document.addEventListener('change', formActivity_, true);
+
+  /**
+   * Text input is watched at the bubbling phase as this seems adequate in
+   * practice and it is less obtrusive to page scripts than capture phase.
+   */
+  document.addEventListener('input', formActivity_, false);
+  document.addEventListener('keyup', formActivity_, false);
+
+  /**
+   * Capture form submit actions.
+   */
+  document.addEventListener('submit', function(evt) {
+    var action;
+    if (evt['defaultPrevented'])
+      return;
+    action = evt.target.getAttribute('action');
+    // Default action is to re-submit to same page.
+    if (!action) {
+      action = document.location.href;
+    }
+    __gCrWeb.message.invokeOnHost({
+             'command': 'document.submit',
+            'formName': __gCrWeb.common.getFormIdentifier(evt.srcElement),
+                'href': getFullyQualifiedURL_(action)
+    });
+  }, false);
+
+  /** @private */
+  function getFullyQualifiedUrl_(originalURL) {

[Eugene But (OOO till 7-30), 2017/04/10 21:42:07]

nit: How about |var getFullyQualifiedUrl_ = function(originalUrl)| for
consistency?

[danyao, 2017/04/10 22:12:59]

Done.

+    // A dummy anchor (never added to the document) is used to obtain the
+    // fully-qualified URL of |originalURL|.
+    var anchor = document.createElement('a');
+    anchor.href = originalURL;
+    return anchor.href;
+  };
+
+  /** Flush the message queue. */
+  if (__gCrWeb.message) {
+    __gCrWeb.message.invokeQueues();
+  }
+
+}());  // End of anonymous object