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

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/chromeos/mobile_setup_ui.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 421 matching lines @@
       base::Bind(&MobileSetupHandler::HandleGetDeviceInfo,
                  base::Unretained(this)));
 }
 
 void MobileSetupHandler::HandleStartActivation(const base::ListValue* args) {
   DCHECK_EQ(TYPE_UNDETERMINED, type_);
 
   if (!web_ui())
     return;
 
-  std::string path = web_ui()->GetWebContents()->GetURL().path();
+  base::StringPiece path = web_ui()->GetWebContents()->GetURL().path();
   if (path.empty())
     return;
 
   LOG(WARNING) << "Starting activation for service " << path;
 
   type_ = TYPE_ACTIVATION;
   MobileActivator::GetInstance()->AddObserver(this);
-  MobileActivator::GetInstance()->InitiateActivation(path.substr(1));
+  MobileActivator::GetInstance()->InitiateActivation(
+      path.substr(1).as_string());
 }
 
 void MobileSetupHandler::HandleSetTransactionStatus(
     const base::ListValue* args) {
   DCHECK_EQ(TYPE_ACTIVATION, type_);
   if (!web_ui())
     return;
 
   const size_t kSetTransactionStatusParamCount = 1;
   if (args->GetSize() != kSetTransactionStatusParamCount)
@@ skipping 22 matching lines @@
 
   MobileActivator::GetInstance()->OnPortalLoaded(
       base::LowerCaseEqualsASCII(result, kJsApiResultOK));
 }
 
 void MobileSetupHandler::HandleGetDeviceInfo(const base::ListValue* args) {
   DCHECK_NE(TYPE_ACTIVATION, type_);
   if (!web_ui())
     return;
 
-  std::string path = web_ui()->GetWebContents()->GetURL().path();
+  base::StringPiece path = web_ui()->GetWebContents()->GetURL().path();
   if (path.empty())
     return;
 
   chromeos::NetworkStateHandler* nsh =
       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;
   }
 
   // If this is the initial call, update the network status and start observing
   // network changes, but only for LTE networks. The other networks should
   // ignore network status.
   if (type_ == TYPE_UNDETERMINED) {
     if (network->network_technology() == shill::kNetworkTechnologyLte ||
@@ skipping 40 matching lines @@
   // Invoke |callback_name| with an empty dictionary.
   base::DictionaryValue device_dict;
   web_ui()->CallJavascriptFunctionUnsafe(callback_name, device_dict);
 }
 
 void MobileSetupHandler::DefaultNetworkChanged(
     const NetworkState* default_network) {
   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;
 
   const NetworkState* network =
       NetworkHandler::Get()->network_state_handler()->GetNetworkState(path);
   if (!network) {
     LOG(ERROR) << "Service path lost";
     web_ui()->GetWebContents()->Close();
     return;
   }
 
   UpdatePortalReachability(network, false /* do not force notification */);
 }
 
 void MobileSetupHandler::NetworkConnectionStateChanged(
     const NetworkState* network) {
   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;
 
   UpdatePortalReachability(network, false /* do not force notification */);
 }
 
 void MobileSetupHandler::UpdatePortalReachability(
     const NetworkState* network,
     bool force_notification) {
   DCHECK(web_ui());
@@ skipping 50 matching lines @@
     int error_code,
     const base::string16& error_description,
     bool was_ignored_by_handler) {
   if (render_frame_host->GetFrameName() != "paymentForm")
     return;
 
   base::FundamentalValue result_value(-error_code);
   web_ui()->CallJavascriptFunctionUnsafe(kJsPortalFrameLoadFailedCallback,
                                          result_value);
 }