Enable unused param checking for public includes.

include/ports/SkFontConfigInterface.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkFontConfigInterface_DEFINED
 #define SkFontConfigInterface_DEFINED
 
@@ skipping 87 matching lines @@
      *  Return a singleton instance of a direct subclass that calls into
      *  libfontconfig. This does not affect the refcnt of the returned instance.
      *  The mutex may be used to guarantee the singleton is only constructed once.
      */
     static SkFontConfigInterface* GetSingletonDirectInterface
         (SkBaseMutex* mutex = NULL);
 
     // New APIS, which have default impls for now (which do nothing)
 
     virtual SkDataTable* getFamilyNames() { return SkDataTable::NewEmpty(); }
-    virtual bool matchFamilySet(const char inFamilyName[],
-                                SkString* outFamilyName,
+    virtual bool matchFamilySet(const char[] /*inFamilyName*/,
+                                SkString* /*outFamilyName*/,
                                 SkTArray<FontIdentity>*) {
         return false;
     }
     typedef SkRefCnt INHERITED;
 };
 
 #endif