DevTools: [Sources] Make typing faster when search is open

third_party/WebKit/Source/devtools/front_end/source_frame/SourcesTextEditor.js

Index: third_party/WebKit/Source/devtools/front_end/source_frame/SourcesTextEditor.js
diff --git a/third_party/WebKit/Source/devtools/front_end/source_frame/SourcesTextEditor.js b/third_party/WebKit/Source/devtools/front_end/source_frame/SourcesTextEditor.js
index 399048116797147f49a4c8e698e7050b82b7e6df..8c647cba906a7fc99e6a441ceaff92dc42d61788 100644
--- a/third_party/WebKit/Source/devtools/front_end/source_frame/SourcesTextEditor.js
+++ b/third_party/WebKit/Source/devtools/front_end/source_frame/SourcesTextEditor.js
@@ -795,7 +795,7 @@ WebInspector.SourcesTextEditor.TokenHighlighter = class {
         null;
     if (selectionStart)
       this._codeMirror.addLineClass(selectionStart.line, 'wrap', 'cm-line-with-selection');
-    if (this._highlightRegex === oldRegex) {
+    if (oldRegex && this._highlightRegex.toString() === oldRegex.toString()) {
       // Do not re-add overlay mode if regex did not change for better performance.
       if (this._highlightDescriptor)
         this._highlightDescriptor.selectionStart = selectionStart;