Bug 1693886 - Increase custom property size limit a bit. r=xidorn

Differential Revision: https://phabricator.services.mozilla.com/D105978

servo/components/style/custom_properties.rs

@@ -174,11 +174,11 @@ impl VariableValue {
         /// Prevent values from getting terribly big since you can use custom
         /// properties exponentially.
         ///
-        /// This number (1MB) is somewhat arbitrary, but silly enough that no
-        /// sane page would hit it. We could limit by number of total
+        /// This number (2MB) is somewhat arbitrary, but silly enough that no
+        /// reasonable page should hit it. We could limit by number of total
         /// substitutions, but that was very easy to work around in practice
         /// (just choose a larger initial value and boom).
-        const MAX_VALUE_LENGTH_IN_BYTES: usize = 1024 * 1024;
+        const MAX_VALUE_LENGTH_IN_BYTES: usize = 2 * 1024 * 1024;
 
         if self.css.len() + css.len() > MAX_VALUE_LENGTH_IN_BYTES {
             return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));