Increase the timeout for the perf buildbots.

masters/master.chromium.chrome/master.cfg

Index: masters/master.chromium.chrome/master.cfg
diff --git a/masters/master.chromium.chrome/master.cfg b/masters/master.chromium.chrome/master.cfg
index 716137348a8e4b73ce3843a5aa92f04ad6f2e3b9..0765bff0f36ff66879d4ecf427720b0c622f0383 100644
--- a/masters/master.chromium.chrome/master.cfg
+++ b/masters/master.chromium.chrome/master.cfg
@@ -90,11 +90,12 @@ b_google_chrome_rel_linux = {
 }
 
 # Please contact chrome-re before changing this _google_chrome_rel builder
+# TODO(krasin): decrease the timeout when https://crbug.com/569732 is fixed.
 # Please keep master.chromium.perf in sync with this
 b_google_chrome_rel_linux_64 = {
   'name': 'Google Chrome Linux x64',
   'builddir': 'google-chrome-rel-linux_64',
-  'factory': m_annotator.BaseFactory('chromium', timeout=3600),
+  'factory': m_annotator.BaseFactory('chromium', timeout=4800),
   'notify_on_missing': True,
 }