Update SplitString calls to new form

extensions/common/csp_validator.cc

Index: extensions/common/csp_validator.cc
diff --git a/extensions/common/csp_validator.cc b/extensions/common/csp_validator.cc
index 1fe22178854f13df8826df4c0e1eea293a353dea..d19b983b9e722e0a81924cb71a6e765ad7313573 100644
--- a/extensions/common/csp_validator.cc
+++ b/extensions/common/csp_validator.cc
@@ -240,8 +240,8 @@ std::string SanitizeContentSecurityPolicy(
     int options,
     std::vector<InstallWarning>* warnings) {
   // See http://www.w3.org/TR/CSP/#parse-a-csp-policy for parsing algorithm.
-  std::vector<std::string> directives;
-  base::SplitString(policy, ';', &directives);
+  std::vector<std::string> directives = base::SplitString(
+      policy, ";", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 
   DirectiveStatus default_src_status(kDefaultSrc);
   DirectiveStatus script_src_status(kScriptSrc);
@@ -307,13 +307,9 @@ std::string SanitizeContentSecurityPolicy(
 bool ContentSecurityPolicyIsSandboxed(
     const std::string& policy, Manifest::Type type) {
   // See http://www.w3.org/TR/CSP/#parse-a-csp-policy for parsing algorithm.
-  std::vector<std::string> directives;
-  base::SplitString(policy, ';', &directives);
-
   bool seen_sandbox = false;
-
-  for (size_t i = 0; i < directives.size(); ++i) {
-    std::string& input = directives[i];
+  for (const std::string& input : base::SplitString(
+           policy, ";", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
     base::StringTokenizer tokenizer(input, " \t\r\n");
     if (!tokenizer.GetNext())
       continue;