Refactor SyncBuildAndRunRevision to remove deep nesting.

tools/auto_bisect/bisect.cfg

Index: tools/auto_bisect/bisect.cfg
diff --git a/tools/auto_bisect/bisect.cfg b/tools/auto_bisect/bisect.cfg
index 91fdd70319f0e1e649e95f3dbda1cefb9a4f239e..65b69d227fc70031aa93a1c0839ac1711e92fc74 100644
--- a/tools/auto_bisect/bisect.cfg
+++ b/tools/auto_bisect/bisect.cfg
@@ -59,13 +59,17 @@ config = {
 """
 
 config = {
-  'command': '',
-  'good_revision': '',
-  'bad_revision': '',
-  'metric': '',
-  'repeat_count':'',
-  'max_time_minutes': '',
-  'truncate_percent':'',
+  'max_time_minutes': '20',
+  'metric': 'Total/Total',
+  'builder_port': '8341',
+  'bug_id': '405188',
+  'repeat_count': '20',
+  'good_revision': '288423',
+  'builder_host': 'master4.golo.chromium.org',
+  'truncate_percent': '25',
+  'command': 'tools/perf/run_benchmark -v --browser=release sunspider',
+  'gs_bucket': 'chrome-perf',
+  'bad_revision': '288447',
 }
 
 # Workaround git try issue, see crbug.com/257689