Get rid of redundant console.assert() from Serializer in assert_selection()

third_party/WebKit/LayoutTests/editing/assert_selection.js

Index: third_party/WebKit/LayoutTests/editing/assert_selection.js
diff --git a/third_party/WebKit/LayoutTests/editing/assert_selection.js b/third_party/WebKit/LayoutTests/editing/assert_selection.js
index 2ee74145ff63043a2113562c4e58759055572bf4..e96ea686eb6c29249bddc8ffe37c7232db87d332 100644
--- a/third_party/WebKit/LayoutTests/editing/assert_selection.js
+++ b/third_party/WebKit/LayoutTests/editing/assert_selection.js
@@ -370,6 +370,8 @@ class Serializer {
    * @param {number} childIndex
    */
   handleSelection(parentNode, childIndex) {
+    if (this.selection_.isNone)
+      return;
     if (parentNode === this.selection_.focusNode &&
         childIndex === this.selection_.focusOffset) {
       this.emit('|');
@@ -388,6 +390,8 @@ class Serializer {
   handleCharacterData(node) {
     /** @type {string} */
     const text = node.nodeValue;
+    if (this.selection_.isNone)
+      return this.emit(text);
     /** @type {number} */
     const anchorOffset = this.selection_.anchorOffset;
     /** @type {number} */