Bug 1797846 - Remove network.url.strip-data-url-whitespace pref r=valentin,sunil,necko-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D209433

modules/libpref/init/StaticPrefList.yaml

@@ -13042,12 +13042,6 @@
   value: 32 * 1024 * 1024
   mirror: always
 
-# Should be removed if no breakage occurs. See bug 1797846
-- name: network.url.strip-data-url-whitespace
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-
   # If true, will be more strict with status code parsing
 - name: network.url.strict_data_url_base64_placement
   type: RelaxedAtomicBool

netwerk/protocol/data/nsDataHandler.cpp

@@ -50,9 +50,7 @@ nsDataHandler::GetScheme(nsACString& result) {
   // Strip whitespace unless this is text, where whitespace is important
   // Don't strip escaped whitespace though (bug 391951)
   nsresult rv;
-  if (base64 || (StaticPrefs::network_url_strip_data_url_whitespace() &&
-                 strncmp(contentType.get(), "text/", 5) != 0 &&
-                 contentType.Find("xml") == kNotFound)) {
+  if (base64) {
     // it's ascii encoded binary, don't let any spaces in
     rv = NS_MutateURI(new mozilla::net::nsSimpleURI::Mutator())
              .Apply(&nsISimpleURIMutator::SetSpecAndFilterWhitespace, aSpec,