DevTools: Add features to collect classnames from Stylesheets and DOM

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

Index: third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
diff --git a/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h b/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
index d23287bccfc5adee8083bdfcd6eb9b336602cae9..f2bf83513d1223605dd307288d48ce369649b0d5 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
+++ b/third_party/WebKit/Source/core/inspector/InspectorDOMAgent.h
@@ -108,6 +108,7 @@ public:
     void enable(ErrorString*) override;
     void disable(ErrorString*) override;
     void getDocument(ErrorString*, std::unique_ptr<protocol::DOM::Node>* root) override;
+    void collectClassNames(ErrorString*, int nodeId, Maybe<protocol::Array<String>>* classNames) override;
     void requestChildNodes(ErrorString*, int nodeId, const Maybe<int>& depth) override;
     void querySelector(ErrorString*, int nodeId, const String& selector, int* outNodeId) override;
     void querySelectorAll(ErrorString*, int nodeId, const String& selector, std::unique_ptr<protocol::Array<int>>* nodeIds) override;