DevTools: Always perform a search when enter is pressed.

Previously we were bailing out of searches if the previous search
returned no results. But things might have changed since the last
search. So always perform a search if the user presses enter.

Bug: 859881
Change-Id: Ibd6a576c69a2e508583c377d7a4d064bbefa403e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1500629Reviewed-by: Erik Luo <luoe@chromium.org>
Commit-Queue: Joel Einbinder <einbinder@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637849}

third_party/blink/renderer/devtools/front_end/ui/SearchableView.js

@@ -374,7 +374,7 @@ UI.SearchableView = class extends UI.VBox {
    * @param {boolean=} isBackwardSearch
    */
   _jumpToNextSearchResult(isBackwardSearch) {
-    if (!this._currentQuery || !this._searchNavigationPrevElement.classList.contains('enabled'))
+    if (!this._currentQuery)
       return;
 
     if (isBackwardSearch)