Oilpan: Fix compile after r200678.

Source/core/inspector/V8DebuggerAgent.cpp

 // Copyright 2015 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/V8DebuggerAgent.h"
 
 #include "bindings/core/v8/ScriptCallStackFactory.h"
 #include "bindings/core/v8/ScriptRegexp.h"
 #include "bindings/core/v8/ScriptValue.h"
@@ skipping 144 matching lines @@
     ASSERT(contextGroupId);
     m_v8AsyncCallTracker = V8AsyncCallTracker::create(this);
     m_promiseTracker = PromiseTracker::create(this, m_isolate);
     clearBreakDetails();
 }
 
 V8DebuggerAgent::~V8DebuggerAgent()
 {
 }
 
+DEFINE_TRACE(V8DebuggerAgent)
+{
+#if ENABLE(OILPAN)
+    visitor->trace(m_injectedScriptManager);
+    visitor->trace(m_asyncCallTrackingListeners);
+    visitor->trace(m_v8AsyncCallTracker);
+    visitor->trace(m_promiseTracker);
+    visitor->trace(m_asyncOperations);
+    visitor->trace(m_currentAsyncCallChain);
+#endif
+}
+
 bool V8DebuggerAgent::checkEnabled(ErrorString* errorString)
 {
     if (enabled())
         return true;
     *errorString = "Debugger agent is not enabled";
     return false;
 }
 
 void V8DebuggerAgent::enable()
 {
@@ skipping 1526 matching lines @@
     RefPtr<ExceptionDetails> exceptionDetails = ExceptionDetails::create().setText(toCoreStringWithUndefinedOrNullCheck(message->Get()));
     exceptionDetails->setLine(message->GetLineNumber());
     exceptionDetails->setColumn(message->GetStartColumn());
     v8::Local<v8::StackTrace> messageStackTrace = message->GetStackTrace();
     if (!messageStackTrace.IsEmpty() && messageStackTrace->GetFrameCount() > 0)
         exceptionDetails->setStackTrace(createScriptCallStack(isolate, messageStackTrace, messageStackTrace->GetFrameCount())->buildInspectorArray());
     return exceptionDetails.release();
 }
 
 } // namespace blink