net: add IsMethodSafe() method to HttpUtil

headless/public/util/generic_url_request_job.cc

Index: headless/public/util/generic_url_request_job.cc
diff --git a/headless/public/util/generic_url_request_job.cc b/headless/public/util/generic_url_request_job.cc
index dcc75c2db58b76c841520cf888544ba2e5789ffc..d3fc0a7be030b99699f9558bd6a6340a8f5d0afa 100644
--- a/headless/public/util/generic_url_request_job.cc
+++ b/headless/public/util/generic_url_request_job.cc
@@ -21,18 +21,10 @@
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/cookies/cookie_store.h"
 #include "net/http/http_response_headers.h"
+#include "net/http/http_util.h"
 #include "net/url_request/url_request_context.h"
 
 namespace headless {
-namespace {
-
-// True if the request method is "safe" (per section 4.2.1 of RFC 7231).
-bool IsMethodSafe(const std::string& method) {
-  return method == "GET" || method == "HEAD" || method == "OPTIONS" ||
-         method == "TRACE";
-}
-
-}  // namespace
 
 uint64_t GenericURLRequestJob::next_request_id_ = 0;
 
@@ -91,7 +83,7 @@ void GenericURLRequestJob::PrepareCookies(const GURL& rewritten_url,
             net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES)) {
       options.set_same_site_cookie_mode(
           net::CookieOptions::SameSiteCookieMode::INCLUDE_STRICT_AND_LAX);
-    } else if (IsMethodSafe(request_->method())) {
+    } else if (net::HttpUtil::IsMethodSafe(request_->method())) {
       options.set_same_site_cookie_mode(
           net::CookieOptions::SameSiteCookieMode::INCLUDE_LAX);
     }