Cleanup: Initialize GURL by moving std::string

url/gurl.cc

Index: url/gurl.cc
diff --git a/url/gurl.cc b/url/gurl.cc
index 2b67beebc498d4a44bb224135110faa5ad324c65..b5cb7daf3c02f20d6dc76a3a99a275762ededb55 100644
--- a/url/gurl.cc
+++ b/url/gurl.cc
@@ -101,9 +101,7 @@ GURL::GURL(const char* canonical_spec,
 }
 
 GURL::GURL(std::string canonical_spec, const url::Parsed& parsed, bool is_valid)
-    : is_valid_(is_valid),
-      parsed_(parsed) {
-  spec_.swap(canonical_spec);
+    : spec_(std::move(canonical_spec)), is_valid_(is_valid), parsed_(parsed) {
   InitializeFromCanonicalSpec();
 }