Remove most uses of UnescapeRule::URL_SPECIAL_CHARS outside net/.

content/browser/web_contents/web_drag_source_mac.mm

Index: content/browser/web_contents/web_drag_source_mac.mm
diff --git a/content/browser/web_contents/web_drag_source_mac.mm b/content/browser/web_contents/web_drag_source_mac.mm
index 94ba59908e563664c62fe5d860aa9ba14009d93f..14321f4787920969514adcfabf8c2cead77202ee 100644
--- a/content/browser/web_contents/web_drag_source_mac.mm
+++ b/content/browser/web_contents/web_drag_source_mac.mm
@@ -174,8 +174,8 @@ void PromiseWriterHelper(const DropData& drop_data,
     // Strip out any existing escapes and then re-escape uniformly.
     if (!url && dropData_->url.SchemeIs(url::kJavaScriptScheme)) {
       net::UnescapeRule::Type unescapeRules =
-          net::UnescapeRule::SPACES |
-          net::UnescapeRule::URL_SPECIAL_CHARS |
+          net::UnescapeRule::SPACES | net::UnescapeRule::PATH_SEPARATORS |
+          net::UnescapeRule::URL_SPECIAL_CHARS_EXCEPT_PATH_SEPARATORS |
           net::UnescapeRule::SPOOFING_AND_CONTROL_CHARS;
       std::string unescapedUrlString =
           net::UnescapeURLComponent(dropData_->url.spec(), unescapeRules);