Make SKP bench JSON ouput better

bench/ResultsWriter.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.
  *
  * Classes for writing out bench results in various formats.
  */
 
 #ifndef SkResultsWriter_DEFINED
@@ skipping 84 matching lines @@
  *      "results" : [
  *         {
  *            "name": "565",
  *            "cmsecs" : 143.188128906250,
  *            "msecs" : 143.835957031250
  *         },
  *         ...
  */
 
 Json::Value* SkFindNamedNode(Json::Value* root, const char name[]);
+Json::Value SkMakeBuilderJSON(const SkString &buildername);
+
 class JSONResultsWriter : public ResultsWriter {
 public:
     explicit JSONResultsWriter(const char filename[])
         : fFilename(filename)
         , fRoot()
         , fResults(fRoot["results"])
         , fBench(NULL)
         , fConfig(NULL) {
     }
     virtual void option(const char name[], const char value[]) {
@@ skipping 74 matching lines @@
  */
 template <typename T> class CallEnd : SkNoncopyable {
 public:
     CallEnd(T& obj) : fObj(obj) {}
     ~CallEnd() { fObj.end(); }
 private:
     T&  fObj;
 };
 
 #endif