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

storage/browser/quota/special_storage_policy.h

Index: storage/browser/quota/special_storage_policy.h
diff --git a/storage/browser/quota/special_storage_policy.h b/storage/browser/quota/special_storage_policy.h
index cac9f94398e7bc86a56e2c93bb26d54da25845be..5c97806a0b8d0beb4cb9cb1ec6ca296ea41bd30d 100644
--- a/storage/browser/quota/special_storage_policy.h
+++ b/storage/browser/quota/special_storage_policy.h
@@ -51,6 +51,10 @@ class STORAGE_EXPORT SpecialStoragePolicy
   // Durable storage is not subject to storage pressure eviction.
   virtual bool IsStorageDurable(const GURL& origin) = 0;
 
+  // Some origins (e.g. installed apps) have access to the size of the remaining
+  // disk capacity.
+  virtual bool CanQueryDiskSize(const GURL& origin) = 0;
+
   // Checks if the origin contains per-site isolated storage.
   virtual bool HasIsolatedStorage(const GURL& origin) = 0;