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

chrome/browser/shell_integration_linux.cc

Index: chrome/browser/shell_integration_linux.cc
diff --git a/chrome/browser/shell_integration_linux.cc b/chrome/browser/shell_integration_linux.cc
index 2a656fe711e02704e7c9e9ed896b47b173b8a008..c0be6de531a5e15c0546339aaeb6966c9d3106e0 100644
--- a/chrome/browser/shell_integration_linux.cc
+++ b/chrome/browser/shell_integration_linux.cc
@@ -435,7 +435,7 @@ ShellIntegration::DefaultWebClientSetPermission
 
 // static
 bool ShellIntegration::SetAsDefaultBrowser() {
-  return SetDefaultWebClient("");
+  return SetDefaultWebClient(std::string());
 }
 
 // static
@@ -445,7 +445,7 @@ bool ShellIntegration::SetAsDefaultProtocolClient(const std::string& protocol) {
 
 // static
 ShellIntegration::DefaultWebClientState ShellIntegration::GetDefaultBrowser() {
-  return GetIsDefaultWebClient("");
+  return GetIsDefaultWebClient(std::string());
 }
 
 // static