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

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

Index: third_party/WebKit/Source/core/timing/PerformanceLongTaskTiming.h
diff --git a/third_party/WebKit/Source/modules/filesystem/FileEntrySync.h b/third_party/WebKit/Source/core/timing/PerformanceLongTaskTiming.h
similarity index 70%
copy from third_party/WebKit/Source/modules/filesystem/FileEntrySync.h
copy to third_party/WebKit/Source/core/timing/PerformanceLongTaskTiming.h
index d6b8d7c746ca670797c58550d8ccacf513ec8d0e..2cd099845e76cea12784bda1e655654e0397f98d 100644
--- a/third_party/WebKit/Source/modules/filesystem/FileEntrySync.h
+++ b/third_party/WebKit/Source/core/timing/PerformanceLongTaskTiming.h
@@ -1,5 +1,6 @@
 /*
- * 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
@@ -28,40 +29,33 @@
  * 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