[CT] Update worker scripts to use new benchmarks and delete old benchmarks

ct/go/worker_scripts/run_chromium_perf/main.go

Index: ct/go/worker_scripts/run_chromium_perf/main.go
diff --git a/ct/go/worker_scripts/run_chromium_perf/main.go b/ct/go/worker_scripts/run_chromium_perf/main.go
index dc9661a05786ee66e055fddfd3e71e47398deeee..588228ccc45ab432b9e564284ceccc4b1f4b58d8 100644
--- a/ct/go/worker_scripts/run_chromium_perf/main.go
+++ b/ct/go/worker_scripts/run_chromium_perf/main.go
@@ -4,6 +4,7 @@ package main
 
 import (
 	"encoding/csv"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"io/ioutil"
@@ -249,15 +250,23 @@ func runBenchmark(fileInfoName, pathToPagesets, pathToPyFiles, localOutputDir, c
 	pagesetName := strings.TrimSuffix(pagesetBaseName, filepath.Ext(pagesetBaseName))
 	pagesetPath := filepath.Join(pathToPagesets, fileInfoName)
 
-	glog.Infof("===== Processing %s for %s =====", pagesetPath, runID)
+	pagesetContent, err := os.Open(pagesetPath)
+	if err != nil {
+		return fmt.Errorf("Could not read %s: %s", pagesetPath, err)
+	}
+	decodedPageset := util.PagesetVars{}
+	if err := json.NewDecoder(pagesetContent).Decode(&decodedPageset); err != nil {
+		return fmt.Errorf("Could not JSON decode %s: %s", pagesetPath, err)
+	}
 
-	skutil.LogErr(os.Chdir(pathToPyFiles))
+	glog.Infof("===== Processing %s for %s =====", pagesetPath, runID)
 	args := []string{
-		util.BINARY_RUN_BENCHMARK,
-		fmt.Sprintf("%s.%s", *benchmarkName, util.BenchmarksToPagesetName[*benchmarkName]),
-		"--page-set-name=" + pagesetName,
-		"--page-set-base-dir=" + pathToPagesets,
+		filepath.Join(util.TelemetryBinariesDir, util.BINARY_RUN_BENCHMARK),
+		util.BenchmarksToPagesetName[*benchmarkName],
 		"--also-run-disabled-tests",
+		"--user-agent=" + decodedPageset.UserAgent,
+		"--urls-list=" + decodedPageset.UrlsList,
+		"--archive-data-file=" + decodedPageset.ArchiveDataFile,
 	}
 
 	// Need to capture output for all benchmarks.