Be explicit about target type in platform_util::OpenItem()

chrome/utility/shell_handler_win.cc

Index: chrome/utility/shell_handler_win.cc
diff --git a/chrome/utility/shell_handler_win.cc b/chrome/utility/shell_handler_win.cc
index e7b3c09e94616eccb6b10c5363f1b252c035751a..1270a2cab91925d6918f8b09e0f69f69fbda6dd8 100644
--- a/chrome/utility/shell_handler_win.cc
+++ b/chrome/utility/shell_handler_win.cc
@@ -19,8 +19,8 @@ ShellHandler::~ShellHandler() {}
 bool ShellHandler::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ShellHandler, message)
-    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_OpenItemViaShell,
-                        OnOpenItemViaShell)
+  IPC_MESSAGE_HANDLER(ChromeUtilityMsg_OpenFileViaShell, OnOpenFileViaShell)
+  IPC_MESSAGE_HANDLER(ChromeUtilityMsg_OpenFolderViaShell, OnOpenFolderViaShell)
     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_GetOpenFileName,
                         OnGetOpenFileName)
     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_GetSaveFileName,
@@ -30,8 +30,12 @@ bool ShellHandler::OnMessageReceived(const IPC::Message& message) {
   return handled;
 }
 
-void ShellHandler::OnOpenItemViaShell(const base::FilePath& full_path) {
-  ui::win::OpenItemViaShell(full_path);
+void ShellHandler::OnOpenFileViaShell(const base::FilePath& full_path) {
+  ui::win::OpenFileViaShell(full_path);
+}
+
+void ShellHandler::OnOpenFolderViaShell(const base::FilePath& full_path) {
+  ui::win::OpenFolderViaShell(full_path);
 }
 
 void ShellHandler::OnGetOpenFileName(