Remove chromeos::CryptohomeLibrary::IsMounted and convert

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

Index: chrome/browser/ui/webui/chromeos/cryptohome_web_ui_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/cryptohome_web_ui_handler.cc b/chrome/browser/ui/webui/chromeos/cryptohome_web_ui_handler.cc
index 5f450aaa4aef0351a11bc0edaa86c6ed8d119c10..add4ee745cc9a195e0c67713e6b726cea0f0bc7f 100644
--- a/chrome/browser/ui/webui/chromeos/cryptohome_web_ui_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/cryptohome_web_ui_handler.cc
@@ -31,8 +31,7 @@ void CryptohomeWebUIHandler::OnPageLoaded(const base::ListValue* args) {
   CryptohomeLibrary* cryptohome_library =
       CrosLibrary::Get()->GetCryptohomeLibrary();
 
-  base::FundamentalValue is_mounted(cryptohome_library->IsMounted());
-  SetCryptohomeProperty("is-mounted", is_mounted);
+  cryptohome_client->IsMounted(GetCryptohomeBoolCallback("is-mounted"));
   cryptohome_client->TpmIsReady(GetCryptohomeBoolCallback("tpm-is-ready"));
   base::FundamentalValue tpm_is_enabled(cryptohome_library->TpmIsEnabled());
   SetCryptohomeProperty("tpm-is-enabled", tpm_is_enabled);