DevTools: remove deprecated shadow dom selectors from inspector LayoutTests

third_party/WebKit/LayoutTests/http/tests/inspector/network/preview-searchable.html

Index: third_party/WebKit/LayoutTests/http/tests/inspector/network/preview-searchable.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/network/preview-searchable.html b/third_party/WebKit/LayoutTests/http/tests/inspector/network/preview-searchable.html
index 415b6d9194aea581ae855b73639629b29addbc30..f1ed3d8af680bf71be96103aa49352e8f0283399 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/network/preview-searchable.html
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/network/preview-searchable.html
@@ -14,10 +14,10 @@ function test()
             view.showSearchField();
             InspectorTest.addResult("Should have found and highlighted all: " + search);
 
-            var foundItems = view.element.querySelectorAll("* /deep/ .highlighted-search-result");
+            var foundItems = view.element.childTextNodes().filter(node => node.parentElement.classList.contains("highlighted-search-result")).map(node => node.parentElement);
             InspectorTest.addResult("Normal search found " + foundItems.length + " results in dom.");
 
-            foundItems = view.element.querySelectorAll("* /deep/ .cm-search-highlight-start");
+            foundItems = view.element.childTextNodes().filter(node => node.parentElement.classList.contains("cm-search-highlight-start")).map(node => node.parentElement);
             InspectorTest.addResult("CodeMirror search found " + foundItems.length + " results in dom.");
             InspectorTest.addResult("");
         }