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

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index 76d5df70e00d0e22e510605ae55a10759959671a..b0c50105039ee4115ede71c53489d8258ea81df7 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -691,8 +691,10 @@ void IOThread::EnableSpdy(const std::string& mode) {
     const std::string& element = *it;
     std::vector<std::string> name_value;
     base::SplitString(element, '=', &name_value);
-    const std::string& option = name_value.size() > 0 ? name_value[0] : "";
-    const std::string value = name_value.size() > 1 ? name_value[1] : "";
+    const std::string& option =
+        name_value.size() > 0 ? name_value[0] : std::string();
+    const std::string value =
+        name_value.size() > 1 ? name_value[1] : std::string();
 
     if (option == kOff) {
       net::HttpStreamFactory::set_spdy_enabled(false);
@@ -739,10 +741,11 @@ void IOThread::RegisterPrefs(PrefRegistrySimple* registry) {
                                "spdyproxy");
   registry->RegisterBooleanPref(prefs::kDisableAuthNegotiateCnameLookup, false);
   registry->RegisterBooleanPref(prefs::kEnableAuthNegotiatePort, false);
-  registry->RegisterStringPref(prefs::kAuthServerWhitelist, "");
-  registry->RegisterStringPref(prefs::kAuthNegotiateDelegateWhitelist, "");
-  registry->RegisterStringPref(prefs::kGSSAPILibraryName, "");
-  registry->RegisterStringPref(prefs::kSpdyProxyAuthOrigin, "");
+  registry->RegisterStringPref(prefs::kAuthServerWhitelist, std::string());
+  registry->RegisterStringPref(prefs::kAuthNegotiateDelegateWhitelist,
+                               std::string());
+  registry->RegisterStringPref(prefs::kGSSAPILibraryName, std::string());
+  registry->RegisterStringPref(prefs::kSpdyProxyAuthOrigin, std::string());
   registry->RegisterBooleanPref(prefs::kEnableReferrers, true);
   registry->RegisterInt64Pref(prefs::kHttpReceivedContentLength, 0);
   registry->RegisterInt64Pref(prefs::kHttpOriginalContentLength, 0);