Move BenchTimer to tools as Timer

tools/skpdiff/skpdiff_util.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #if SK_BUILD_FOR_MAC || SK_BUILD_FOR_UNIX || SK_BUILD_FOR_ANDROID
 #   include <unistd.h>
 #   include <sys/time.h>
@@ skipping 65 matching lines @@
         case CL_INVALID_OPERATION:               return "CL_INVALID_OPERATION";
         case CL_INVALID_GL_OBJECT:               return "CL_INVALID_GL_OBJECT";
         case CL_INVALID_BUFFER_SIZE:             return "CL_INVALID_BUFFER_SIZE";
         case CL_INVALID_MIP_LEVEL:               return "CL_INVALID_MIP_LEVEL";
         default:                                 return "UNKNOWN";
     }
     return "UNKNOWN";
 }
 #endif
 
-// TODO refactor BenchTimer to be used here
+// TODO refactor Timer to be used here
 double get_seconds() {
 #if SK_BUILD_FOR_WIN32
     LARGE_INTEGER currentTime;
     LARGE_INTEGER frequency;
     QueryPerformanceCounter(&currentTime);
     QueryPerformanceFrequency(&frequency);
     return (double)currentTime.QuadPart / (double)frequency.QuadPart;
 #elif _POSIX_TIMERS > 0 && defined(CLOCK_REALTIME)
     struct timespec currentTime;
     clock_gettime(CLOCK_REALTIME, &currentTime);
@@ skipping 100 matching lines @@
 #elif SK_BUILD_FOR_WIN32
     SkString fullPath(MAX_PATH);
     if (_fullpath(fullPath.writable_str(), path.c_str(), MAX_PATH) == NULL) {
         fullPath.reset();
     }
     return fullPath;
 #else
     return SkString();
 #endif
 }