Revert of Update SplitString calls to new form

extensions/common/url_pattern.cc

Index: extensions/common/url_pattern.cc
diff --git a/extensions/common/url_pattern.cc b/extensions/common/url_pattern.cc
index b91d4383704388b8f1affad2073ddd856de01eb9..502c459d43353ac94c3443d9a7d6d724e53074ea 100644
--- a/extensions/common/url_pattern.cc
+++ b/extensions/common/url_pattern.cc
@@ -237,12 +237,11 @@
     host_ = pattern.substr(host_start_pos, host_end_pos - host_start_pos);
 
     // The first component can optionally be '*' to match all subdomains.
-    std::vector<std::string> host_components = base::SplitString(
-        host_, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
+    std::vector<std::string> host_components;
+    base::SplitString(host_, '.', &host_components);
 
     // Could be empty if the host only consists of whitespace characters.
-    if (host_components.empty() ||
-        (host_components.size() == 1 && host_components[0].empty()))
+    if (host_components.empty())
       return PARSE_ERROR_EMPTY_HOST;
 
     if (host_components[0] == "*") {