Rewrite std::string("") to std::string(), Linux edition.

This patch was generated by running the empty_string clang tool
across the Chromium Linux compilation database. Implicitly or
explicitly constructing std::string() with a "" argument is
inefficient as the caller needs to emit extra instructions to
pass an argument, and the constructor needlessly copies a byte
into internal storage. Rewriting these instances to simply call
the default constructor appears to save ~14-18 kilobytes on an
optimized release build.

BUG=none

Review URL: https://codereview.chromium.org/13145003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193020 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 2 insertions, 2 deletions

diff --git a/net/base/net_util.cc b/net/base/net_util.cc
index 066812c..18d00fe 100644
--- a/net/base/net_util.cc
+++ b/net/base/net_util.cc
@@ -1433,7 +1433,7 @@ std::string NetAddressToString(const struct sockaddr* sa,
   if (!GetIPAddressFromSockAddr(sa, sock_addr_len, &address,
                                 &address_len, NULL)) {
     NOTREACHED();
-    return "";
+    return std::string();
   }
   return IPAddressToString(address, address_len);
 }
@@ -1446,7 +1446,7 @@ std::string NetAddressToStringWithPort(const struct sockaddr* sa,
   if (!GetIPAddressFromSockAddr(sa, sock_addr_len, &address,
                                 &address_len, &port)) {
     NOTREACHED();
-    return "";
+    return std::string();
   }
   return IPAddressToStringWithPort(address, address_len, port);
 }