Update from https://crrev.com/327068

base/files/file.h

Index: base/files/file.h
diff --git a/base/files/file.h b/base/files/file.h
index 13c8a96fcefe29ad89112946e705ae86e07790bd..89077b41c1d8d03a9aa1e33ea822b9fb9454f807 100644
--- a/base/files/file.h
+++ b/base/files/file.h
@@ -150,13 +150,13 @@ class BASE_EXPORT File {
     bool is_symbolic_link;
 
     // The last modified time of a file.
-    base::Time last_modified;
+    Time last_modified;
 
     // The last accessed time of a file.
-    base::Time last_accessed;
+    Time last_accessed;
 
     // The creation time of a file.
-    base::Time creation_time;
+    Time creation_time;
   };
 
   File();
@@ -182,10 +182,6 @@ class BASE_EXPORT File {
   // Creates or opens the given file.
   void Initialize(const FilePath& name, uint32 flags);
 
-  // Creates or opens the given file, allowing paths with traversal ('..')
-  // components. Use only with extreme care.
-  void InitializeUnsafe(const FilePath& name, uint32 flags);
-
   bool IsValid() const;
 
   // Returns true if a new file was created (or an old one truncated to zero
@@ -354,6 +350,14 @@ class BASE_EXPORT File {
   };
 #endif
 
+  // Creates or opens the given file. Only called if |name| has no traversal
+  // ('..') components.
+  void DoInitialize(const FilePath& name, uint32 flags);
+
+  // TODO(tnagel): Reintegrate into Flush() once histogram isn't needed anymore,
+  // cf. issue 473337.
+  bool DoFlush();
+
   void SetPlatformFile(PlatformFile file);
 
 #if defined(OS_WIN)