[realbox] Allows navigation when input has leading whitespace

Whitespaces are removed from the beginning of the input string returned
in the AutocompleteResult. This should be taken into account when
deciding whether the results are fresh when they arrive as well as when
navigating to them. This CL accounts for that subtlety in the latter.

Fixed: 1102345
Change-Id: I2f34805dfd2cb02aed6659f497347c93771e5666
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2560070Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Moe Ahmadi <mahmadi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#831139}

chrome/browser/resources/new_tab_page/realbox.js

@@ -539,7 +539,9 @@ class RealboxElement extends PolymerElement {
 
     if (e.key === 'Enter') {
       if ([this.$.matches, this.$.input].includes(e.target)) {
-        if (this.lastQueriedInput_ === decodeString16(this.result_.input)) {
+        if (this.lastQueriedInput_ !== null &&
+            this.lastQueriedInput_.trimLeft() ===
+                decodeString16(this.result_.input)) {
           if (this.selectedMatch_) {
             this.navigateToMatch_(this.selectedMatchIndex_, e);
           }

chrome/test/data/webui/new_tab_page/realbox_test.js

@@ -809,7 +809,7 @@ suite('NewTabPageRealboxTest', () => {
     // Input is expected to have been focused before any navigation.
     realbox.$.input.dispatchEvent(new Event('focus'));
 
-    realbox.$.input.value = 'hello';
+    realbox.$.input.value = '  hello  ';
     realbox.$.input.dispatchEvent(new CustomEvent('input'));
 
     const matches = [
@@ -860,7 +860,7 @@ suite('NewTabPageRealboxTest', () => {
         // Input is expected to have been focused before any navigation.
         realbox.$.input.dispatchEvent(new Event('focus'));
 
-        realbox.$.input.value = 'hello ';
+        realbox.$.input.value = '  hello  ';
         realbox.$.input.dispatchEvent(new CustomEvent('input'));
 
         const matches =