Add path utils, plus a test for it.

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"
@@ skipping 23 matching lines @@
     typedef Json::UInt64 Checksum;
     static inline Json::Value asJsonValue(Checksum checksum) {
         return checksum;
     }
     static inline Checksum asChecksum(Json::Value jsonValue) {
         return jsonValue.asUInt64();
     }
 
     void gm_fprintf(FILE *stream, const char format[], ...);
 
-    /**
-     * Assembles rootPath and relativePath into a single path, like this:
-     * rootPath/relativePath
-     *
-     * Uses SkPATH_SEPARATOR, to work on all platforms.
-     *
-     * TODO(epoger): This should probably move into SkOSFile.h
-     */
-    SkString SkPathJoin(const char *rootPath, const char *relativePath);
-
     Json::Value ActualResultAsJsonValue(const SkHashDigest& result);
 
     Json::Value CreateJsonTree(Json::Value expectedResults,
                                Json::Value actualResultsFailed,
                                Json::Value actualResultsFailureIgnored,
                                Json::Value actualResultsNoComparison,
                                Json::Value actualResultsSucceeded);
 
     /**
      * Test expectations (allowed image checksums, etc.)
@@ skipping 152 matching lines @@
          * Returns true if successful.
          */
         static bool Parse(const char *jsonPath, Json::Value *jsonRoot);
 
         Json::Value fJsonRoot;
         Json::Value fJsonExpectedResults;
     };
 
 }
 #endif