Make sure that HttpRequestHeaders contains valid key-value pairs.

chrome/browser/extensions/api/web_request/web_request_api_helpers.cc

Index: chrome/browser/extensions/api/web_request/web_request_api_helpers.cc
diff --git a/chrome/browser/extensions/api/web_request/web_request_api_helpers.cc b/chrome/browser/extensions/api/web_request/web_request_api_helpers.cc
index df425e665e16675d72c2a7d8fa32da39240b83b4..80860db72d64f6045e3a2730bb80e106b5d123f7 100644
--- a/chrome/browser/extensions/api/web_request/web_request_api_helpers.cc
+++ b/chrome/browser/extensions/api/web_request/web_request_api_helpers.cc
@@ -1242,15 +1242,4 @@ void NotifyWebRequestAPIUsed(
   }
 }
 
-bool IsValidHeaderName(const std::string& name) {
-  // Check whether the header name is RFC 2616-compliant.
-  return net::HttpUtil::IsToken(name);
-}
-
-bool IsValidHeaderValue(const std::string& value) {
-  // Just a sanity check: disallow NUL and CRLF.
-  return value.find('\0') == std::string::npos &&
-      value.find("\r\n") == std::string::npos;
-}
-
 }  // namespace extension_web_request_api_helpers