[cronet] Update PERF_IDs for new builders.

scripts/slave/recipes/cronet.expected/android_cronet_marshmallow_64bit_perf.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "cleanup index.lock",
     "~followup_annotations": [
@@ skipping 315 matching lines @@
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"master\", \"buildername\": \"Android Cronet Marshmallow 64bit Perf\", \"buildnumber\": 571, \"mastername\": \"chromium.testing.master\", \"project\": \"src\", \"recipe\": \"cronet\", \"repository\": \"https://chromium.googlesource.com/chromium/src\", \"revision\": \"4f4b02f6b7fa20a3a25682c457bbc8ad589c8a00\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--test-type=sizes",
       "--builder-name=Android Cronet Marshmallow 64bit Perf",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "--annotate=graphing",
       "--results-url=https://chromeperf.appspot.com",
       "--perf-dashboard-id=sizes",
-      "--perf-id=android_cronet_builder",
+      "--perf-id=android_cronet_m64_perf",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/chromium/sizes.py",
       "--target",
       "Release",
       "--platform",
       "android-cronet"
     ],
     "name": "sizes"
   },
   {
     "cmd": [
@@ skipping 375 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]