Sort #includes that got unsorted when gmock.h and gtest.h moved to webrtc/test/

webrtc/modules/media_file/media_file_unittest.cc

Index: webrtc/modules/media_file/media_file_unittest.cc
diff --git a/webrtc/modules/media_file/media_file_unittest.cc b/webrtc/modules/media_file/media_file_unittest.cc
index 3fa0afcd3dd5f06b5f37a2a4ec22758ab09b4d75..cbea836fcff189d23f82edec803fd31c81a1fcd2 100644
--- a/webrtc/modules/media_file/media_file_unittest.cc
+++ b/webrtc/modules/media_file/media_file_unittest.cc
@@ -8,9 +8,9 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/test/gtest.h"
 #include "webrtc/modules/media_file/media_file.h"
 #include "webrtc/system_wrappers/include/sleep.h"
+#include "webrtc/test/gtest.h"
 #include "webrtc/test/testsupport/fileutils.h"
 
 class MediaFileTest : public testing::Test {