Prettify Mac names, rewrite getDisplayPath API call to focus on $HOME

chrome/browser/extensions/api/file_system/file_system_api.cc

Index: chrome/browser/extensions/api/file_system/file_system_api.cc
diff --git a/chrome/browser/extensions/api/file_system/file_system_api.cc b/chrome/browser/extensions/api/file_system/file_system_api.cc
index fd3bcbb69d5d722ac86c8fec49e9821536db6873..d48c2b81148f0f3133d15079b7a76b97b48d26d7 100644
--- a/chrome/browser/extensions/api/file_system/file_system_api.cc
+++ b/chrome/browser/extensions/api/file_system/file_system_api.cc
@@ -4,6 +4,10 @@
 
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
 
+#if defined(OS_MACOSX)
+#include "base/mac/foundation_util.h"
+#endif
+
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ -46,10 +50,16 @@ namespace {
 
 struct RewritePair {
   int path_key;
-  const char* output;
+  const char* output;  // NULL indicates that this display name should be
+                       // retrieved from the system.
 };
 
 const RewritePair g_rewrite_pairs[] = {
+#if defined(OS_MACOSX)
+  {base::DIR_DESKTOP, NULL},
+  {base::DIR_DOCUMENTS, NULL},
+  {base::DIR_DOWNLOADS, NULL},
+#endif
 #if defined(OS_WIN)
   {base::DIR_PROFILE, "~"},
 #elif defined(OS_POSIX)
@@ -65,7 +75,22 @@ FilePath PrettifyPath(const FilePath& file_path) {
       continue;  // We don't DCHECK this value, as Get will return false even
                  // if the path_key gives a blank string as a result.
 
-    FilePath output = FilePath::FromUTF8Unsafe(g_rewrite_pairs[i].output);
+    FilePath output;
+    if (!g_rewrite_pairs[i].output) {
+#if defined(OS_MACOSX)
+      if (!candidate_path.IsParent(file_path))
+        continue;
+
+      std::string display_name;
+      base::mac::GetDisplayNameForPath(candidate_path, &display_name);
+      output = FilePath::FromUTF8Unsafe(display_name);
+#else
+      NOTREACHED();
+#endif
+    } else {
+      output = FilePath::FromUTF8Unsafe(g_rewrite_pairs[i].output);
+    }
+
     if (candidate_path.AppendRelativePath(file_path, &output)) {
       // The output path must not be absolute, as it might collide with the
       // real filesystem.