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

ct/go/worker_scripts/run_chromium_perf/main.go

 // run_chromium_perf is an application that runs the specified benchmark over CT's
 // webpage archives.
 package main
 
 import (
         "encoding/csv"
+        "encoding/json"
         "flag"
         "fmt"
         "io/ioutil"
         "os"
         "path/filepath"
         "runtime"
         "sync"
         "time"
 
         "github.com/skia-dev/glog"
@@ skipping 225 matching lines @@
         if pagesetBaseName == util.TIMESTAMP_FILE_NAME || filepath.Ext(pagesetBaseName) == ".pyc" {
                 // Ignore timestamp files and .pyc files.
                 return nil
         }
 
         // Convert the filename into a format consumable by the run_benchmarks
         // binary.
         pagesetName := strings.TrimSuffix(pagesetBaseName, filepath.Ext(pagesetBaseName))
         pagesetPath := filepath.Join(pathToPagesets, fileInfoName)
 
+        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)
+        }
+
         glog.Infof("===== Processing %s for %s =====", pagesetPath, runID)
-
-        skutil.LogErr(os.Chdir(pathToPyFiles))
         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.
         outputDirArgValue := filepath.Join(localOutputDir, pagesetName)
         args = append(args, "--output-dir="+outputDirArgValue)
         // Figure out which browser should be used.
         if *targetPlatform == util.PLATFORM_ANDROID {
                 if err := util.InstallChromeAPK(chromiumBuildName); err != nil {
                         return fmt.Errorf("Error while installing APK: %s", err)
                 }
@@ skipping 112 matching lines @@
                 return fmt.Errorf("Could not write to %s: %s", csvPath, err)
         }
         // Write all values.
         for _, row := range values {
                 if err := writer.Write(row); err != nil {
                         return fmt.Errorf("Could not write to %s: %s", csvPath, err)
                 }
         }
         return nil
 }