Centralize more querySelector logic behind QuerySelectorCache.

third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
index 2b2907febbb86f9d344dd6dfdc3b5eca14adfe7d..655a092e4b9f40c5dd5a4012fee0c83c5badb6d0 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
@@ -1958,8 +1958,9 @@ InspectorCSSAgent::buildArrayForMatchedRuleList(CSSRuleList* ruleList,
         matched = matchesPseudoElement(
             selector, elementPseudoId);  // Modifies |selector|.
       else
-        matched = element->matches(firstTagHistorySelector->selectorText(),
-                                   IGNORE_EXCEPTION_FOR_TESTING);
+        matched = element->matches(
+            AtomicString(firstTagHistorySelector->selectorText()),
+            IGNORE_EXCEPTION_FOR_TESTING);
       if (matched)
         matchingSelectors->addItem(index);
       ++index;