Implement <script nomodule>

third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
index 05ffc6b464cbc334cfba759883037467daee38c3..987188ba6db07afa12572bb6145ec753fb3b427d 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner.cpp
@@ -144,6 +144,7 @@ class TokenPreloadScanner::StartTagScanner {
         link_is_import_(false),
         matched_(true),
         input_is_image_(false),
+        nomodule_attribute_value_(false),
         source_size_(0),
         source_size_set_(false),
         defer_(FetchParameters::kNoDefer),
@@ -289,6 +290,8 @@ class TokenPreloadScanner::StartTagScanner {
       type_attribute_value_ = attribute_value;
     else if (Match(attribute_name, languageAttr))
       language_attribute_value_ = attribute_value;
+    else if (Match(attribute_name, nomoduleAttr))
+      nomodule_attribute_value_ = true;
   }
 
   template <typename NameType>
@@ -524,6 +527,7 @@ class TokenPreloadScanner::StartTagScanner {
     if (Match(tag_impl_, scriptTag) &&
         !ScriptLoader::IsValidScriptTypeAndLanguage(
             type_attribute_value_, language_attribute_value_,
+            nomodule_attribute_value_,
             ScriptLoader::kAllowLegacyTypeInTypeAttribute)) {
       return false;
     }
@@ -555,6 +559,7 @@ class TokenPreloadScanner::StartTagScanner {
   String as_attribute_value_;
   String type_attribute_value_;
   String language_attribute_value_;
+  bool nomodule_attribute_value_;
   float source_size_;
   bool source_size_set_;
   FetchParameters::DeferOption defer_;