Deprecate more old filepath functions.

webkit/tools/test_shell/test_shell_mac.mm

Index: webkit/tools/test_shell/test_shell_mac.mm
diff --git a/webkit/tools/test_shell/test_shell_mac.mm b/webkit/tools/test_shell/test_shell_mac.mm
index 9b9b9aa231ec03acc4de5b2555cf3a51adc251c8..08c1432deccf52d9509b1df90f6d3f9c0af2d4f3 100644
--- a/webkit/tools/test_shell/test_shell_mac.mm
+++ b/webkit/tools/test_shell/test_shell_mac.mm
@@ -593,7 +593,7 @@ void TestShell::LoadURLForFrame(const GURL& url,
 }
 
 bool TestShell::PromptForSaveFile(const wchar_t* prompt_title,
-                                  std::wstring* result)
+                                  FilePath* result)
 {
   NSSavePanel* save_panel = [NSSavePanel savePanel];
 
@@ -605,7 +605,7 @@ bool TestShell::PromptForSaveFile(const wchar_t* prompt_title,
   /* display the NSSavePanel */
   if ([save_panel runModalForDirectory:NSHomeDirectory() file:@""] ==
       NSOKButton) {
-    result->assign(UTF8ToWide([[save_panel filename] UTF8String]));
+    *result = FilePath([[save_panel filename] fileSystemRepresentation]);
     return true;
   }
   return false;
@@ -672,8 +672,7 @@ base::StringPiece GetDataResource(int resource_id) {
       // use a PNG. The GIF doesn't have the color range needed to correctly
       // match the TIFF they use in Safari.
       path = path.AppendASCII("missingImage.png");
-      bool success = file_util::ReadFileToString(path.ToWStringHack(),
-                                                 &broken_image_data);
+      bool success = file_util::ReadFileToString(path, &broken_image_data);
       if (!success) {
         LOG(FATAL) << "Failed reading: " << path.value();
       }
@@ -686,8 +685,7 @@ base::StringPiece GetDataResource(int resource_id) {
     if (resize_corner_data.empty()) {
       FilePath path = GetResourcesFilePath();
       path = path.AppendASCII("textAreaResizeCorner.png");
-      bool success = file_util::ReadFileToString(path.ToWStringHack(),
-                                                 &resize_corner_data);
+      bool success = file_util::ReadFileToString(path, &resize_corner_data);
       if (!success) {
         LOG(FATAL) << "Failed reading: " << path.value();
       }