Adding Variable builders to cover all builders under master "chromium"

masters/master.tryserver.chromium.linux/master.cfg

Index: masters/master.tryserver.chromium.linux/master.cfg
diff --git a/masters/master.tryserver.chromium.linux/master.cfg b/masters/master.tryserver.chromium.linux/master.cfg
index 1a8c57c5d925106d85fc0a986be729e5e2f7511c..cdd8a35789bae2095326a59eeb3d7b6ebdae807c 100644
--- a/masters/master.tryserver.chromium.linux/master.cfg
+++ b/masters/master.tryserver.chromium.linux/master.cfg
@@ -349,6 +349,16 @@ variable_builders = [
     'slavebuilddir': 'linux_32',
   },
   {
+    'name': 'linux_chromium_variable_clobber',
+    'factory': m_annotator.BaseFactory('findit/chromium/compile'),
+    'slavebuilddir': 'linux_clobber',
+  },
+  {
+    'name': 'linux_chromium_variable_32_clobber',
+    'factory': m_annotator.BaseFactory('findit/chromium/compile'),
+    'slavebuilddir': 'linux_clobber',
+  },
+  {
     'name': 'linux_chromium_asan_variable',
     'factory': m_annotator.BaseFactory('findit/chromium/compile'),
     'slavebuilddir': 'linux_asan',