DevTools: Add features to collect classnames from Stylesheets and DOM

third_party/WebKit/Source/core/inspector/InspectorStyleSheet.h

Index: third_party/WebKit/Source/core/inspector/InspectorStyleSheet.h
diff --git a/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.h b/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.h
index 8bfdba6a75ba7fefa85863ed8ff7a0485a812d81..aafb5f97ae9aa2b38b9393035c4e6b0569049c39 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.h
+++ b/third_party/WebKit/Source/core/inspector/InspectorStyleSheet.h
@@ -135,7 +135,7 @@ public:
     CSSMediaRule* setMediaRuleText(const SourceRange&, const String& selector, SourceRange* newRange, String* oldSelector, ExceptionState&);
     CSSStyleRule* addRule(const String& ruleText, const SourceRange& location, SourceRange* addedRange, ExceptionState&);
     bool deleteRule(const SourceRange&, ExceptionState&);
-
+    std::unique_ptr<protocol::Array<String>> collectClassNames();
     CSSStyleSheet* pageStyleSheet() { return m_pageStyleSheet.get(); }
 
     std::unique_ptr<protocol::CSS::CSSStyleSheetHeader> buildObjectForStyleSheetInfo();
@@ -145,7 +145,6 @@ public:
 
     std::unique_ptr<protocol::CSS::SourceRange> ruleHeaderSourceRange(CSSRule*);
     std::unique_ptr<protocol::CSS::SourceRange> mediaQueryExpValueSourceRange(CSSRule*, size_t mediaQueryIndex, size_t mediaQueryExpIndex);
-
     bool isInlineStyle() override { return false; }
     const CSSRuleVector& flatRules();
     CSSRuleSourceData* sourceDataForRule(CSSRule*);
@@ -160,6 +159,7 @@ private:
     CSSRuleSourceData* findRuleByHeaderRange(const SourceRange&);
     CSSRuleSourceData* findRuleByBodyRange(const SourceRange&);
     CSSRule* ruleForSourceData(CSSRuleSourceData*);
+    void getClassNameFromRule(CSSRule*,  HashSet<String>& uniqueNames);
     CSSStyleRule* insertCSSOMRuleInStyleSheet(CSSRule* insertBefore, const String& ruleText, ExceptionState&);
     CSSStyleRule* insertCSSOMRuleInMediaRule(CSSMediaRule*, CSSRule* insertBefore, const String& ruleText, ExceptionState&);
     CSSStyleRule* insertCSSOMRuleBySourceRange(const SourceRange&, const String& ruleText, ExceptionState&);