Revert of Support tracing metrics for measureTime & measureFrameTime method in blink_perf

tools/perf/benchmarks/blink_perf.js

Index: tools/perf/benchmarks/blink_perf.js
diff --git a/tools/perf/benchmarks/blink_perf.js b/tools/perf/benchmarks/blink_perf.js
index bb764cf4f7715547391d08fb3c30594e1db5d755..465e1ffd7409837bc95bf5c05a6b1e3f49718e84 100644
--- a/tools/perf/benchmarks/blink_perf.js
+++ b/tools/perf/benchmarks/blink_perf.js
@@ -12,24 +12,6 @@
   this.isDone = true;
 };
 
-testRunner.supportTracing = true;
-
-// If this is true, blink_perf tests is put on paused waiting for tracing to
-// be started. |scheduleTestRun| should be invoked after tracing is started
-// to continue blink perf test.
-testRunner.isWaitingForTracingStart = false;
-
-testRunner.startTracing = function(tracingCategories, scheduleTestRun) {
-  this.tracingCategories = tracingCategories;
-  this.scheduleTestRun = scheduleTestRun;
-  this.isWaitingForTracingStart = true;
-}
-
-testRunner.stopTracingAndMeasure = function(traceEventsToMeasure, callback) {
-  testRunner.traceEventsToMeasure = traceEventsToMeasure;
-  callback();
-}
-
 window.GCController = {};
 
 GCController.collect = function() {