DevTools: Add features to collect classnames from Stylesheets and DOM

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 fbd395b0546bb4c75aa89484aaad029e6ba84b8a..9bce4548c243c4f44053b94b6fc89cc13ae1d3c8 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp
@@ -1083,6 +1083,16 @@ void InspectorCSSAgent::getStyleSheetText(ErrorString* errorString, const String
     inspectorStyleSheet->getText(result);
 }
 
+void InspectorCSSAgent::collectClassNames(ErrorString* errorString, const String& styleSheetId, std::unique_ptr<protocol::Array<String>>* classNames)
+{
+    IdToInspectorStyleSheet::iterator it = m_idToInspectorStyleSheet.find(styleSheetId);
+    if (it == m_idToInspectorStyleSheet.end()) {
+        *errorString = "No style sheet with given id found";
+        return;
+    }
+    *classNames = it->value.get()->collectClassNames();
+}
+
 void InspectorCSSAgent::setStyleSheetText(ErrorString* errorString, const String& styleSheetId, const String& text, protocol::Maybe<String>* sourceMapURL)
 {
     FrontendOperationScope scope;