Cherry-pick 6d291b6. rdar://problem/113714342

    Web Inspector: No search results
    https://bugs.webkit.org/show_bug.cgi?id=259843

    Reviewed by Devin Rousso.

    Web Inspector search is not working due to _inputFieldSearch(event) not
    being triggered.

    Replace incremental with throttle and replace "search" with "input".

    Import Throttler class to add _inputFieldInputThrottler function to handle throttler for "input" using fire function.
    Incorporate 250 ms delay.

    In _inputFieldKeyDown use findBannerRevealPreviousResult and findBannerRevealNextResult for shift and enter key presses
    replacing _searchBackwards and _searchForwards.

    Delete _inputFieldKeyUp.

    Delete _searchBackwards and _searchForwards in _inputFieldInput(event).

    * Source/WebInspectorUI/UserInterface/Views/FindBanner.js:
    (WI.FindBanner.prototype._inputFieldKeyDown):
    (WI.FindBanner.prototype._inputFieldInput):
    (WI.FindBanner.prototype._inputFieldKeyUp): Deleted.
    (WI.FindBanner.prototype._inputFieldSearch): Deleted.

    Canonical link: https://commits.webkit.org/266783@main

Identifier: 266246.380@safari-7617.1.4-branch

Source/WebInspectorUI/UserInterface/Views/FindBanner.js

@@ -44,12 +44,13 @@ WI.FindBanner = class FindBanner extends WI.NavigationItem
         this._inputField.type = "search";
         this._inputField.placeholder = " "; // This is necessary for :placeholder-shown.
         this._inputField.spellcheck = false;
-        this._inputField.incremental = true;
         this._inputField.setAttribute("results", 5);
         this._inputField.setAttribute("autosave", "inspector-search");
         this._inputField.addEventListener("keydown", this._inputFieldKeyDown.bind(this), false);
-        this._inputField.addEventListener("keyup", this._inputFieldKeyUp.bind(this), false);
-        this._inputField.addEventListener("search", this._inputFieldSearch.bind(this), false);
+        this._inputFieldInputThrottler = new Throttler(this._inputFieldInput.bind(this), 250);
+        this._inputField.addEventListener("input", (event) => {
+            this._inputFieldInputThrottler.fire(event);
+        }, false);
         this.element.appendChild(this._inputField);
 
         this._previousResultButton = document.createElement("button");
@@ -86,8 +87,6 @@ WI.FindBanner = class FindBanner extends WI.NavigationItem
         }
 
         this._numberOfResults = null;
-        this._searchBackwards = false;
-        this._searchKeyPressed = false;
         this._previousSearchValue = "";
     }
 
@@ -229,34 +228,22 @@ WI.FindBanner = class FindBanner extends WI.NavigationItem
 
     _inputFieldKeyDown(event)
     {
-        if (event.keyIdentifier === "Shift")
-            this._searchBackwards = true;
-        else if (event.keyIdentifier === "Enter")
-            this._searchKeyPressed = true;
-    }
-
-    _inputFieldKeyUp(event)
-    {
-        if (event.keyIdentifier === "Shift")
-            this._searchBackwards = false;
-        else if (event.keyIdentifier === "Enter")
-            this._searchKeyPressed = false;
+        if (event.keyIdentifier === "Enter") {
+            if (this._numberOfResults > 0) {
+                if (event.shiftKey)
+                    this._delegate?.findBannerRevealPreviousResult?.(this);
+                else
+                    this._delegate?.findBannerRevealNextResult?.(this);
+            }
+        }
     }
 
-    _inputFieldSearch(event)
+    _inputFieldInput(event)
     {
         if (this._inputField.value) {
             if (this._previousSearchValue !== this.searchQuery) {
                 if (this._delegate && typeof this._delegate.findBannerPerformSearch === "function")
                     this._delegate.findBannerPerformSearch(this, this.searchQuery);
-            } else if (this._searchKeyPressed && this._numberOfResults > 0) {
-                if (this._searchBackwards) {
-                    if (this._delegate && typeof this._delegate.findBannerRevealPreviousResult === "function")
-                        this._delegate.findBannerRevealPreviousResult(this);
-                } else {
-                    if (this._delegate && typeof this._delegate.findBannerRevealNextResult === "function")
-                        this._delegate.findBannerRevealNextResult(this);
-                }
             }
         } else {
             this.numberOfResults = null;