DevTools: extract V8DebuggerAgent interface, move it under .../inspector/v8

third_party/WebKit/Source/core/inspector/AsyncCallTracker.cpp

Index: third_party/WebKit/Source/core/inspector/AsyncCallTracker.cpp
diff --git a/third_party/WebKit/Source/core/inspector/AsyncCallTracker.cpp b/third_party/WebKit/Source/core/inspector/AsyncCallTracker.cpp
index 5f2d474438288a68ab20749d2564ba2c3999e00b..52046515f36822d5f36f8baefd2b9937b566d421 100644
--- a/third_party/WebKit/Source/core/inspector/AsyncCallTracker.cpp
+++ b/third_party/WebKit/Source/core/inspector/AsyncCallTracker.cpp
@@ -37,7 +37,6 @@
 #include "core/events/Event.h"
 #include "core/events/EventTarget.h"
 #include "core/inspector/AsyncOperationMap.h"
-#include "core/inspector/V8DebuggerAgent.h"
 #include "core/xmlhttprequest/XMLHttpRequest.h"
 #include "core/xmlhttprequest/XMLHttpRequestUpload.h"
 #include "platform/ScriptForbiddenScope.h"
@@ -140,14 +139,10 @@ AsyncCallTracker::AsyncCallTracker(V8DebuggerAgent* debuggerAgent, Instrumenting
     : m_debuggerAgent(debuggerAgent)
     , m_instrumentingAgents(instrumentingAgents)
 {
-    m_debuggerAgent->addAsyncCallTrackingListener(this);
 }
 
 AsyncCallTracker::~AsyncCallTracker()
 {
-#if !ENABLE(OILPAN)
-    m_debuggerAgent->removeAsyncCallTrackingListener(this);
-#endif
 }
 
 void AsyncCallTracker::asyncCallTrackingStateChanged(bool tracking)
@@ -434,7 +429,6 @@ DEFINE_TRACE(AsyncCallTracker)
     visitor->trace(m_debuggerAgent);
     visitor->trace(m_instrumentingAgents);
 #endif
-    V8DebuggerAgent::AsyncCallTrackingListener::trace(visitor);
 }
 
 } // namespace blink