Move WriteFile and WriteFileDescriptor from file_util to base namespace.

base/file_util.h

Index: base/file_util.h
diff --git a/base/file_util.h b/base/file_util.h
index bd339980494e924d524f7a65619c70d3681ecbe9..32dce3b1a5ee0d93a83a930b8891b0f3a6a613f0 100644
--- a/base/file_util.h
+++ b/base/file_util.h
@@ -328,20 +328,22 @@ BASE_EXPORT bool TruncateFile(FILE* file);
 // the number of read bytes, or -1 on error.
 BASE_EXPORT int ReadFile(const FilePath& filename, char* data, int size);
 
-}  // namespace base
-
-// -----------------------------------------------------------------------------
-
-namespace file_util {
-
 // Writes the given buffer into the file, overwriting any data that was
 // previously there.  Returns the number of bytes written, or -1 on error.
-BASE_EXPORT int WriteFile(const base::FilePath& filename, const char* data,
+BASE_EXPORT int WriteFile(const FilePath& filename, const char* data,
                           int size);
+
 #if defined(OS_POSIX)
 // Append the data to |fd|. Does not close |fd| when done.
 BASE_EXPORT int WriteFileDescriptor(const int fd, const char* data, int size);
 #endif
+
+}  // namespace base
+
+// -----------------------------------------------------------------------------
+
+namespace file_util {
+
 // Append the given buffer into the file. Returns the number of bytes written,
 // or -1 on error.
 BASE_EXPORT int AppendToFile(const base::FilePath& filename,