Upgrade Blink to milliseconds-based last modified filetimes, part 3.

Source/platform/FileMetadata.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 24 matching lines @@
 #include "platform/weborigin/KURL.h"
 #include "wtf/MathExtras.h"
 #include "wtf/text/WTFString.h"
 #include <time.h>
 
 namespace blink {
 
 inline double invalidFileTime() { return std::numeric_limits<double>::quiet_NaN(); }
 inline bool isValidFileTime(double time) { return std::isfinite(time); }
 
-struct FileMetadata {
-    // The last modification time of the file, in seconds.
-    // The value 0.0 means that the time is not set.
-    double modificationTime;
+class FileMetadata {
+public:
+    FileMetadata()
+        : modificationTimeMS(invalidFileTime())
+        , length(-1)
+        , type(TypeUnknown)
+    {
+    }
+
+    // The last modification time of the file, in milliseconds.
+    // The value NaN means that the time is not known.
+    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;
     String platformPath;
-
-    FileMetadata() : modificationTime(invalidFileTime()), length(-1), type(TypeUnknown) { }
 };
 
 PLATFORM_EXPORT bool getFileSize(const String&, long long& result);
-PLATFORM_EXPORT bool getFileModificationTime(const String&, time_t& result);
+PLATFORM_EXPORT bool getFileModificationTime(const String&, double& result);
 PLATFORM_EXPORT bool getFileMetadata(const String&, FileMetadata&);
 PLATFORM_EXPORT String directoryName(const String&);
 PLATFORM_EXPORT KURL filePathToURL(const String&);
 
 } // namespace blink
 
 #endif // FileMetadata_h