Move password-related methods from core.js to password_controller.js.

ios/chrome/browser/passwords/resources/password_controller.js

Index: ios/chrome/browser/passwords/resources/password_controller.js
diff --git a/ios/chrome/browser/passwords/resources/password_controller.js b/ios/chrome/browser/passwords/resources/password_controller.js
index f3bb4213d9097e437d8dd52d3c0753e3b917288e..c04af67cdf8314a4b9c6a35861f8be75a50409cd 100644
--- a/ios/chrome/browser/passwords/resources/password_controller.js
+++ b/ios/chrome/browser/passwords/resources/password_controller.js
@@ -28,13 +28,54 @@ if (__gCrWeb && !__gCrWeb['fillPasswordForm']) {
    */
   __gCrWeb['findPasswordForms'] = function() {
     var formDataList = [];
-    if (__gCrWeb.hasPasswordField()) {
+    if (hasPasswordField_(window)) {
       __gCrWeb.getPasswordFormDataList(formDataList, window);
     }
     return __gCrWeb.stringify(formDataList);
   };
 
   /**
+   * Returns true if the top window or any frames inside contain an input field
+   * of type 'password'. This method is only used for unit tests and are only
+   * kept for legacy reasons. Prefer to use the private
+   * {@code hasPasswordField_} within this file.
+   * @return {boolean} Whether a password field exists.
+   *
+   * TODO(crbug.com/614092): investigate if this method can be completely
+   * removed from the gCrWeb public interface.
+   */
+  __gCrWeb['hasPasswordField'] = function() {
+    return hasPasswordField_(window);
+  };
+
+  /** Returns true if the supplied window or any frames inside contain an input
+   * field of type 'password'.
+   * @private
+   */
+  var hasPasswordField_ = function(win) {
+    var doc = win.document;
+
+    // We may will not be allowed to read the 'document' property from a frame
+    // that is in a different domain.
+    if (!doc) {
+      return false;
+    }
+
+    if (doc.querySelector('input[type=password]')) {
+      return true;
+    }
+
+    var frames = win.frames;
+    for (var i = 0; i < frames.length; i++) {
+      if (hasPasswordField_(frames[i])) {
+        return true;
+      }
+    }
+
+    return false;
+  };
+
+  /**
    * Returns the password form with the given |name| as a JSON string.
    * @param {string} name The name of the form to extract.
    * @return {string} The password form.