Accessing directories in extensions should not cause content verifier failure.

extensions/browser/content_hash_reader.cc

Index: extensions/browser/content_hash_reader.cc
diff --git a/extensions/browser/content_hash_reader.cc b/extensions/browser/content_hash_reader.cc
index 76c7e606126e5d71d82cfe220123c77edaccf261..499587b0874de792c80d4daea8c7ed26ca695e98 100644
--- a/extensions/browser/content_hash_reader.cc
+++ b/extensions/browser/content_hash_reader.cc
@@ -53,7 +53,7 @@ bool ContentHashReader::Init() {
 
   // Check that this is a valid resource to verify (i.e., it exists).
   base::FilePath content_path = extension_root_.Append(relative_path_);
-  if (!base::PathExists(content_path))
+  if (!base::PathExists(content_path) || base::DirectoryExists(content_path))
     return false;
 
   content_exists_ = true;