LongTaskTiming: add idl, Experiment flag, PerformanceEntry and basic implementation

third_party/WebKit/Source/core/timing/PerformanceLongTaskTiming.h

 /*
- * Copyright (C) 2010 Google Inc. All rights reserved.
+ * Copyright (C) 2016 Google Inc. All rights reserved.
+ * Copyright (C) 2016 Intel 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
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef FileEntrySync_h
-#define FileEntrySync_h
+#ifndef PerformanceLongTaskTiming_h
+#define PerformanceLongTaskTiming_h
 
-#include "modules/filesystem/EntrySync.h"
+#include "core/timing/PerformanceEntry.h"
 #include "platform/heap/Handle.h"
+#include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-class ExceptionState;
-class File;
-class FileWriterSync;
+class Document;
 
-class FileEntrySync final : public EntrySync {
+class PerformanceLongTaskTiming final : public PerformanceEntry {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static FileEntrySync* create(DOMFileSystemBase* fileSystem, const String& fullPath)
+    static PerformanceLongTaskTiming* create(double startTime, double endTime, String frameContextUrl)
     {
-        return new FileEntrySync(fileSystem, fullPath);
+        return new PerformanceLongTaskTiming(startTime, endTime, frameContextUrl);
     }
 
-    bool isFile() const override { return true; }
-
-    File* file(ExceptionState&);
-    FileWriterSync* createWriter(ExceptionState&);
-
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    FileEntrySync(DOMFileSystemBase*, const String& fullPath);
+    PerformanceLongTaskTiming(double startTime, double endTime, String frameContextUrl);
+    ~PerformanceLongTaskTiming() override;
 };
 
-DEFINE_TYPE_CASTS(FileEntrySync, EntrySync, entry, entry->isFile(), entry.isFile());
-
 } // namespace blink
 
-#endif // FileEntrySync_h
+#endif // PerformanceLongTaskTiming_h