DevTools: introduce protocol::Value, baseline for hierarchical data in remote debugging protocol.

third_party/WebKit/Source/platform/v8_inspector/V8HeapProfilerAgentImpl.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8HeapProfilerAgentImpl_h
 #define V8HeapProfilerAgentImpl_h
 
 #include "platform/v8_inspector/public/V8HeapProfilerAgent.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class V8RuntimeAgent;
 
 typedef String ErrorString;
 
 using protocol::Maybe;
 
 class V8HeapProfilerAgentImpl : public V8HeapProfilerAgent {
     WTF_MAKE_NONCOPYABLE(V8HeapProfilerAgentImpl);
 public:
     explicit V8HeapProfilerAgentImpl(v8::Isolate*, V8RuntimeAgent*);
     ~V8HeapProfilerAgentImpl() override;
 
-    void setInspectorState(PassRefPtr<JSONObject> state) override { m_state = state; }
+    void setInspectorState(PassRefPtr<protocol::DictionaryValue> state) override { m_state = state; }
     void setFrontend(protocol::Frontend::HeapProfiler* frontend) override { m_frontend = frontend; }
     void clearFrontend() override;
     void restore() override;
 
     void collectGarbage(ErrorString*) override;
 
     void enable(ErrorString*) override;
     void startTrackingHeapObjects(ErrorString*, const Maybe<bool>& trackAllocations) override;
     void stopTrackingHeapObjects(ErrorString*, const Maybe<bool>& reportProgress) override;
 
@@ skipping 10 matching lines @@
 
     void requestHeapStatsUpdate() override;
 
 private:
     void startTrackingHeapObjectsInternal(bool trackAllocations);
     void stopTrackingHeapObjectsInternal();
 
     v8::Isolate* m_isolate;
     V8RuntimeAgent* m_runtimeAgent;
     protocol::Frontend::HeapProfiler* m_frontend;
-    RefPtr<JSONObject> m_state;
+    RefPtr<protocol::DictionaryValue> m_state;
 };
 
 } // namespace blink
 
 #endif // !defined(V8HeapProfilerAgentImpl_h)