Remove declaration of GetCertificateMimeTypeForMimeType.

components/mime_util/mime_util.h

Index: components/mime_util/mime_util.h
diff --git a/components/mime_util/mime_util.h b/components/mime_util/mime_util.h
index 5653ffc89cdcc5681dbdf864fb814a29da359dee..a10c47eb84efcbd533035f90486cf64ea99608a2 100644
--- a/components/mime_util/mime_util.h
+++ b/components/mime_util/mime_util.h
@@ -7,8 +7,6 @@
 
 #include <string>
 
-#include "net/base/mime_util.h"
-
 namespace mime_util {
 
 // Check to see if a particular MIME type is in the list of
@@ -21,9 +19,6 @@ bool IsSupportedJavascriptMimeType(const std::string& mime_type);
 // Convenience function.
 bool IsSupportedMimeType(const std::string& mime_type);
 
-net::CertificateMimeType GetCertificateMimeTypeForMimeType(
-    const std::string& mime_type);
-
 }  // namespace mime_util
 
 #endif  // COMPONENTS_MIME_UTIL_MIME_UTIL_H__