Eliminate component/update_client dependency on content/

components/update_client/DEPS

Index: components/update_client/DEPS
diff --git a/components/update_client/DEPS b/components/update_client/DEPS
index 7fa716527b183e620b3ca0ed48426c3224c2bd9e..9cb7e781190e250cf587779cd3eb03c71b12d722 100644
--- a/components/update_client/DEPS
+++ b/components/update_client/DEPS
@@ -9,12 +9,3 @@ include_rules = [
   "+third_party/libxml",
   "+third_party/zlib",
 ]
-
-# Tests can use things in content.
-# TODO(sorin): refactor to eliminate the dependency on content by using
-# message loops directly.
-specific_include_rules = {
-  ".*unittest\.cc": [
-    "+content",
-  ]
-}