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

chrome/common/extensions/api/commands/commands_handler.cc

Index: chrome/common/extensions/api/commands/commands_handler.cc
diff --git a/chrome/common/extensions/api/commands/commands_handler.cc b/chrome/common/extensions/api/commands/commands_handler.cc
index 309a204fc80d334b914f947cc0584f0a2e640c89..b5ed3c4dcb42b0c6b54d426e903f328e6133221f 100644
--- a/chrome/common/extensions/api/commands/commands_handler.cc
+++ b/chrome/common/extensions/api/commands/commands_handler.cc
@@ -137,8 +137,10 @@ void CommandsHandler::MaybeSetBrowserActionDefault(const Extension* extension,
                                                    CommandsInfo* info) {
   if (extension->manifest()->HasKey(keys::kBrowserAction) &&
       !info->browser_action_command.get()) {
-    info->browser_action_command.reset(new Command(
-        extension_manifest_values::kBrowserActionCommandEvent, string16(), ""));
+    info->browser_action_command.reset(
+        new Command(extension_manifest_values::kBrowserActionCommandEvent,
+                    string16(),
+                    std::string()));
   }
 }