replace gm_fprintf() calls with SkDebugf()

gm/gm_expectations.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 gm_expectations_DEFINED
 #define gm_expectations_DEFINED
 
 #include "gm.h"
 #include "SkBitmap.h"
 #include "SkBitmapHasher.h"
 #include "SkData.h"
 #include "SkJSONCPP.h"
 #include "SkOSFile.h"
 #include "SkRefCnt.h"
 #include "SkStream.h"
 #include "SkTArray.h"
 
 
 namespace skiagm {
 
-    void gm_fprintf(FILE *stream, const char format[], ...);
-
     Json::Value CreateJsonTree(Json::Value expectedResults,
                                Json::Value actualResultsFailed,
                                Json::Value actualResultsFailureIgnored,
                                Json::Value actualResultsNoComparison,
                                Json::Value actualResultsSucceeded);
 
     /**
      * The digest of a GM test result.
      *
      * Currently, this is always a uint64_t hash digest of an SkBitmap...
@@ skipping 229 matching lines @@
          * Returns true if successful.
          */
         static bool Parse(const char *jsonPath, Json::Value *jsonRoot);
 
         Json::Value fJsonRoot;
         Json::Value fJsonExpectedResults;
     };
 
 }
 #endif