Update from https://crrev.com/320343

sdch/logging_forward.h

Index: sdch/logging_forward.h
diff --git a/sdch/logging_forward.h b/sdch/logging_forward.h
new file mode 100644
index 0000000000000000000000000000000000000000..fc0d3278c187867fe05fb6d391c3c2a66374721a
--- /dev/null
+++ b/sdch/logging_forward.h
@@ -0,0 +1,22 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SDCH_LOGGING_FORWARD_H_
+#define SDCH_LOGGING_FORWARD_H_
+
+// Define open-vcdiff's logging.h header guard, so that it doesn't get used.
+#define OPEN_VCDIFF_LOGGING_H_
+
+#include "base/logging.h"
+
+// open-vcdiff's logging.h includes iostream, which adds static initializers
+// to several compilation units. To prevent this, provide this replacement
+// header which forwards open-vcdiffs logging macros to chromium's base logging
+// mechanism.
+#define VCD_WARNING LOG(WARNING)
+#define VCD_ERROR LOG(ERROR)
+#define VCD_DFATAL LOG(DFATAL)
+#define VCD_ENDL "\n"
+
+#endif  // SDCH_LOGGING_FORWARD_H_