Revert of Change how the quota system computes the total poolsize for temporary storage

extensions/shell/browser/shell_special_storage_policy.cc

Index: extensions/shell/browser/shell_special_storage_policy.cc
diff --git a/extensions/shell/browser/shell_special_storage_policy.cc b/extensions/shell/browser/shell_special_storage_policy.cc
index 26b9dc24aeb5404d0542d8f2d9381591282acb28..d43c71bfdd786986958a68e26f4346c77cc604fa 100644
--- a/extensions/shell/browser/shell_special_storage_policy.cc
+++ b/extensions/shell/browser/shell_special_storage_policy.cc
@@ -30,6 +30,10 @@ bool ShellSpecialStoragePolicy::IsStorageSessionOnly(const GURL& origin) {
   return false;
 }
 
+bool ShellSpecialStoragePolicy::CanQueryDiskSize(const GURL& origin) {
+  return true;
+}
+
 bool ShellSpecialStoragePolicy::HasSessionOnlyOrigins() {
   return false;
 }