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

chrome/browser/content_settings/host_content_settings_map.cc

Index: chrome/browser/content_settings/host_content_settings_map.cc
diff --git a/chrome/browser/content_settings/host_content_settings_map.cc b/chrome/browser/content_settings/host_content_settings_map.cc
index 8749d6f98c749cc6847336288bcc2229073da8d4..777203d532890446aaa49767cd8e4be0bb541b53 100644
--- a/chrome/browser/content_settings/host_content_settings_map.cc
+++ b/chrome/browser/content_settings/host_content_settings_map.cc
@@ -133,7 +133,7 @@ void HostContentSettingsMap::RegisterExtensionService(
   OnContentSettingChanged(ContentSettingsPattern(),
                           ContentSettingsPattern(),
                           CONTENT_SETTINGS_TYPE_DEFAULT,
-                          "");
+                          std::string());
 }
 #endif
 
@@ -159,7 +159,7 @@ ContentSetting HostContentSettingsMap::GetDefaultContentSettingFromProvider(
     ContentSettingsType content_type,
     content_settings::ProviderInterface* provider) const {
   scoped_ptr<content_settings::RuleIterator> rule_iterator(
-      provider->GetRuleIterator(content_type, "", false));
+      provider->GetRuleIterator(content_type, std::string(), false));
 
   ContentSettingsPattern wildcard = ContentSettingsPattern::Wildcard();
   while (rule_iterator->HasNext()) {
@@ -460,19 +460,18 @@ void HostContentSettingsMap::MigrateObsoleteClearOnExitPref() {
   AddSettingsForOneType(content_settings_providers_[PREF_PROVIDER],
                         PREF_PROVIDER,
                         CONTENT_SETTINGS_TYPE_COOKIES,
-                        "",
+                        std::string(),
                         &exceptions,
                         false);
   for (ContentSettingsForOneType::iterator it = exceptions.begin();
        it != exceptions.end(); ++it) {
     if (it->setting != CONTENT_SETTING_ALLOW)
       continue;
-    SetWebsiteSetting(
-        it->primary_pattern,
-        it->secondary_pattern,
-        CONTENT_SETTINGS_TYPE_COOKIES,
-        "",
-        Value::CreateIntegerValue(CONTENT_SETTING_SESSION_ONLY));
+    SetWebsiteSetting(it->primary_pattern,
+                      it->secondary_pattern,
+                      CONTENT_SETTINGS_TYPE_COOKIES,
+                      std::string(),
+                      Value::CreateIntegerValue(CONTENT_SETTING_SESSION_ONLY));
   }
 
   prefs_->SetBoolean(prefs::kContentSettingsClearOnExitMigrated, true);