[DevTools] Remove state from v8 agent wrappers, remove unnecessary classes.

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

Index: third_party/WebKit/Source/core/inspector/InspectorDebuggerAgent.h
diff --git a/third_party/WebKit/Source/core/inspector/InspectorDebuggerAgent.h b/third_party/WebKit/Source/core/inspector/InspectorDebuggerAgent.h
index ddc711a31b0ec1e390d2637786f50744e8ffcbbe..9742c527128e62314208a4e87a2405fe8d520acb 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorDebuggerAgent.h
+++ b/third_party/WebKit/Source/core/inspector/InspectorDebuggerAgent.h
@@ -43,6 +43,7 @@ class CORE_EXPORT InspectorDebuggerAgent
     : public InspectorBaseAgent<InspectorDebuggerAgent, protocol::Frontend::Debugger>
     , public protocol::Backend::Debugger {
 public:
+    explicit InspectorDebuggerAgent(V8DebuggerAgent*);
     ~InspectorDebuggerAgent() override;
     DECLARE_VIRTUAL_TRACE();
 
@@ -82,8 +83,6 @@ public:
     void restore() override;
 
 protected:
-    explicit InspectorDebuggerAgent(V8DebuggerAgent*);
-
     V8DebuggerAgent* m_v8DebuggerAgent;
 };