Delete FilesystemInterface::CopyFile.

webrtc/base/win32filesystem.cc

Index: webrtc/base/win32filesystem.cc
diff --git a/webrtc/base/win32filesystem.cc b/webrtc/base/win32filesystem.cc
index 4bc2218fa5e33b5bd76c3caa18fdadaaa1b41e6c..519f62a70eadd8b7231323f49d0c4bb2f4fef2b8 100644
--- a/webrtc/base/win32filesystem.cc
+++ b/webrtc/base/win32filesystem.cc
@@ -160,12 +160,6 @@ bool Win32Filesystem::IsAbsent(const Pathname& path) {
   return (ERROR_FILE_NOT_FOUND == err || ERROR_PATH_NOT_FOUND == err);
 }
 
-bool Win32Filesystem::CopyFile(const Pathname &old_path,
-                               const Pathname &new_path) {
-  return ::CopyFile(ToUtf16(old_path.pathname()).c_str(),
-                    ToUtf16(new_path.pathname()).c_str(), TRUE) != 0;
-}
-
 bool Win32Filesystem::IsTemporaryPath(const Pathname& pathname) {
   TCHAR buffer[MAX_PATH + 1];
   if (!::GetTempPath(arraysize(buffer), buffer))