DevTools: Support async call stacks for FileSystem API (part 1).

Source/core/inspector/AsyncCallStackTracker.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 #include "bindings/core/v8/ScriptValue.h"
 #include "wtf/Deque.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
+class AsyncFileSystemCallbacks;
 class Event;
 class EventListener;
 class EventTarget;
 class ExecutionContext;
 class ExecutionContextTask;
 class MutationObserver;
 class XMLHttpRequest;
 
 class AsyncCallStackTracker {
     WTF_MAKE_NONCOPYABLE(AsyncCallStackTracker);
@@ skipping 42 matching lines @@
 
     void didEnqueueMutationRecord(ExecutionContext*, MutationObserver*, const ScriptValue& callFrames);
     bool hasEnqueuedMutationRecord(ExecutionContext*, MutationObserver*);
     void didClearAllMutationRecords(ExecutionContext*, MutationObserver*);
     void willDeliverMutationRecords(ExecutionContext*, MutationObserver*);
 
     void didPostExecutionContextTask(ExecutionContext*, ExecutionContextTask*, const ScriptValue& callFrames);
     void didKillAllExecutionContextTasks(ExecutionContext*);
     void willPerformExecutionContextTask(ExecutionContext*, ExecutionContextTask*);
 
+    void didEnqueueAsyncFileSystemCallback(ExecutionContext*, AsyncFileSystemCallbacks*, const ScriptValue& callFrames);
+    void didRemoveAsyncFileSystemCallback(ExecutionContext*, AsyncFileSystemCallbacks*);
+    void willHandleAsyncFileSystemCallback(ExecutionContext*, AsyncFileSystemCallbacks*, bool hasMore);
+
     void didEnqueueV8AsyncTask(ExecutionContext*, const String& eventName, int id, const ScriptValue& callFrames);
     void willHandleV8AsyncTask(ExecutionContext*, const String& eventName, int id);
 
+    void willRescheduleAsyncCallChain();
+    void didRescheduleAsyncCallChain();
+
     void didFireAsyncCall();
     void clear();
 
 private:
     void willHandleXHREvent(XMLHttpRequest*, EventTarget*, Event*);
 
     PassRefPtr<AsyncCallChain> createAsyncCallChain(const String& description, const ScriptValue& callFrames);
     void setCurrentAsyncCallChain(ExecutionContext*, PassRefPtr<AsyncCallChain>);
     void clearCurrentAsyncCallChain();
     static void ensureMaxAsyncCallChainDepth(AsyncCallChain*, unsigned);
     bool validateCallFrames(const ScriptValue& callFrames);
 
     class ExecutionContextData;
     ExecutionContextData* createContextDataIfNeeded(ExecutionContext*);
 
     unsigned m_maxAsyncCallStackDepth;
     RefPtr<AsyncCallChain> m_currentAsyncCallChain;
     unsigned m_nestedAsyncCallCount;
+    bool m_rescheduleNextAsyncCallChain;
+    RefPtr<AsyncCallChain> m_rescheduledAsyncCallChain;
     typedef HashMap<ExecutionContext*, ExecutionContextData*> ExecutionContextDataMap;
     ExecutionContextDataMap m_executionContextDataMap;
 };
 
 } // namespace WebCore
 
 #endif // !defined(AsyncCallStackTracker_h)