[WIP] make GURL::path() return a StringPiece

chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc

Index: chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc b/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
index dfcd2cbcb3e2fe0a4a86e7eddf0d8d356170ddbc..70464eaf99d4b80342a51ca520c7c148cec4eda2 100644
--- a/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
+++ b/chrome/browser/ui/webui/chromeos/mobile_setup_ui.cc
@@ -439,7 +439,7 @@ void MobileSetupHandler::HandleStartActivation(const base::ListValue* args) {
   if (!web_ui())
     return;
 
-  std::string path = web_ui()->GetWebContents()->GetURL().path();
+  base::StringPiece path = web_ui()->GetWebContents()->GetURL().path();
   if (path.empty())
     return;
 
@@ -447,7 +447,8 @@ void MobileSetupHandler::HandleStartActivation(const base::ListValue* args) {
 
   type_ = TYPE_ACTIVATION;
   MobileActivator::GetInstance()->AddObserver(this);
-  MobileActivator::GetInstance()->InitiateActivation(path.substr(1));
+  MobileActivator::GetInstance()->InitiateActivation(
+      path.substr(1).as_string());
 }
 
 void MobileSetupHandler::HandleSetTransactionStatus(
@@ -490,7 +491,7 @@ void MobileSetupHandler::HandleGetDeviceInfo(const base::ListValue* args) {
   if (!web_ui())
     return;
 
-  std::string path = web_ui()->GetWebContents()->GetURL().path();
+  base::StringPiece path = web_ui()->GetWebContents()->GetURL().path();
   if (path.empty())
     return;
 
@@ -498,7 +499,8 @@ void MobileSetupHandler::HandleGetDeviceInfo(const base::ListValue* args) {
       NetworkHandler::Get()->network_state_handler();
   // TODO: Figure out why the path has an extra '/' in the front. (e.g. It is
   // '//service/5' instead of '/service/5'.
-  const NetworkState* network = nsh->GetNetworkState(path.substr(1));
+  const NetworkState* network =
+      nsh->GetNetworkState(path.substr(1).as_string());
   if (!network) {
     web_ui()->GetWebContents()->Close();
     return;
@@ -559,7 +561,8 @@ void MobileSetupHandler::DefaultNetworkChanged(
   if (!web_ui())
     return;
 
-  std::string path = web_ui()->GetWebContents()->GetURL().path().substr(1);
+  std::string path =
+      web_ui()->GetWebContents()->GetURL().path().substr(1).as_string();
   if (path.empty())
     return;
 
@@ -579,7 +582,8 @@ void MobileSetupHandler::NetworkConnectionStateChanged(
   if (!web_ui())
     return;
 
-  std::string path = web_ui()->GetWebContents()->GetURL().path().substr(1);
+  std::string path =
+      web_ui()->GetWebContents()->GetURL().path().substr(1).as_string();
   if (path.empty() || path != network->path())
     return;