Revert 63600 - Thread IO safety: annotate file_util, and block IO thread from...

chrome/common/extensions/extension_resource.cc

Index: chrome/common/extensions/extension_resource.cc
===================================================================
--- chrome/common/extensions/extension_resource.cc	(revision 63629)
+++ chrome/common/extensions/extension_resource.cc	(working copy)
@@ -6,7 +6,6 @@
 
 #include "base/file_util.h"
 #include "base/logging.h"
-#include "base/thread_restrictions.h"
 
 PlatformThreadId ExtensionResource::file_thread_id_ = 0;
 
@@ -46,12 +45,6 @@
 // static
 FilePath ExtensionResource::GetFilePathOnAnyThreadHack(
     const FilePath& extension_root, const FilePath& relative_path) {
-  // This function is a hack, and causes us to block the IO thread.
-  // Fixing
-  //   http://code.google.com/p/chromium/issues/detail?id=59849
-  // would also fix this.  Suppress the error for now.
-  base::ThreadRestrictions::ScopedAllowIO allow_io;
-
   // We need to resolve the parent references in the extension_root
   // path on its own because IsParent doesn't like parent references.
   FilePath clean_extension_root(extension_root);