Oilpan: fix build after r187699.

Source/core/inspector/V8AsyncCallTracker.cpp

 // Copyright 2014 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.
 
 #include "config.h"
 #include "core/inspector/V8AsyncCallTracker.h"
 
 #include "bindings/core/v8/V8PerContextData.h"
 #include "core/inspector/AsyncCallChainMap.h"
 #include "platform/heap/Handle.h"
@@ skipping 16 matching lines @@
     WTF_MAKE_NONCOPYABLE(V8ContextAsyncCallChains);
 public:
     explicit V8ContextAsyncCallChains(InspectorDebuggerAgent* debuggerAgent)
         : m_v8AsyncCallChains(debuggerAgent)
     {
     }
 
     ~V8ContextAsyncCallChains()
     {
         // FIXME: get rid of the dispose method and this class altogether once AsyncCallChainMap is always allocated on C++ heap.
         m_v8AsyncCallChains.dispose();

[haraken, 2014/12/25 23:55:09]

Not related to this CL, it looks unsafe to touch m_v8AsyncCallChains in
V8ContextAsyncCallChains's destructor.

[sof, 2014/12/26 07:19:25]

Yes, there needs to be a dispose()/reset() call from InspectorDebuggerAgent to
clear this out (via V8AsyncCallTracker) instead. Which was pointed out on the
CL, I believe.

     }
 
     void trace(Visitor* visitor)
     {
 #if ENABLE(OILPAN)
         visitor->trace(m_v8AsyncCallChains);
 #endif
     }
 
     AsyncCallChainMap<String> m_v8AsyncCallChains;
@@ skipping 16 matching lines @@
 {
     ASSERT(m_contextAsyncCallChainMap.isEmpty());
 }
 
 void V8AsyncCallTracker::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_contextAsyncCallChainMap);
     visitor->trace(m_debuggerAgent);
 #endif
+    InspectorDebuggerAgent::AsyncCallTrackingListener::trace(visitor);
 }
 
 void V8AsyncCallTracker::asyncCallTrackingStateChanged(bool)
 {
 }
 
 void V8AsyncCallTracker::resetAsyncCallChains()
 {
     for (auto& it : m_contextAsyncCallChainMap)
         it.key->removeObserver(this);
@@ skipping 38 matching lines @@
     if (V8ContextAsyncCallChains* contextCallChains = m_contextAsyncCallChainMap.get(state)) {
         String taskId = makeV8AsyncTaskUniqueId(eventName, id);
         m_debuggerAgent->setCurrentAsyncCallChain(state->isolate(), contextCallChains->m_v8AsyncCallChains.get(taskId));
         contextCallChains->m_v8AsyncCallChains.remove(taskId);
     } else {
         m_debuggerAgent->setCurrentAsyncCallChain(state->isolate(), nullptr);
     }
 }
 
 } // namespace blink