Media Galleries: Prune uninteresting folders when scanning.

chrome/common/chrome_paths_mac.mm

Index: chrome/common/chrome_paths_mac.mm
===================================================================
--- chrome/common/chrome_paths_mac.mm	(revision 253526)
+++ chrome/common/chrome_paths_mac.mm	(working copy)
@@ -219,6 +219,14 @@
   return base::mac::GetLocalDirectory(NSLibraryDirectory, result);
 }
 
+bool GetUserLibraryDirectory(base::FilePath* result) {
+  return base::mac::GetUserDirectory(NSLibraryDirectory, result);
+}
+
+bool GetUserApplicationsDirectory(base::FilePath* result) {
+  return base::mac::GetUserDirectory(NSApplicationDirectory, result);
+}
+
 bool GetGlobalApplicationSupportDirectory(base::FilePath* result) {
   return base::mac::GetLocalDirectory(NSApplicationSupportDirectory, result);
 }