Upgrade Blink to milliseconds-based last modified filetimes, part 1.

public/platform/WebFileInfo.h

 /*
  * Copyright (C) 2010 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 18 matching lines @@
  */
 
 #ifndef WebFileInfo_h
 #define WebFileInfo_h
 
 #include "WebString.h"
 
 namespace blink {
 
 struct WebFileInfo {
-    // The last modification time of the file, in seconds.
-    // The value 0.0 means that the time is not set.
+    // The last modification time of the file, in seconds since Epoch,
+    // with a quiet NaN value representing "not known."
+    // FIXME: change to be milliseconds-based once the transition to a
+    // WebFileInfo with milliseconds-based modification is complete.
     double modificationTime;
 
+    // The last modification time of the file, in milliseconds since Epoch,
+    // with a quiet NaN value representing "not known."
+    // FIXME: remove once the milliseconds transition is complete.
+    double modificationTimeMS;
+
     // The length of the file in bytes.
     // The value -1 means that the length is not set.
     long long length;
 
     enum Type {
         TypeUnknown = 0,
         TypeFile,
         TypeDirectory
     };
 
     Type type;
 
     WebString platformPath;
 
-    WebFileInfo() : modificationTime(0.0), length(-1), type(TypeUnknown) { }
+    WebFileInfo()
+        : modificationTime(0.0)
+        , modificationTimeMS(0.0)
+        , length(-1)
+        , type(TypeUnknown)
+    {
+    }
 };
 
 } // namespace blink
 
-#endif
+#endif // WebFileInfo_h