Don't preload scripts with invalid type/language attributes

third_party/WebKit/Source/core/dom/ScriptLoader.h

Index: third_party/WebKit/Source/core/dom/ScriptLoader.h
diff --git a/third_party/WebKit/Source/core/dom/ScriptLoader.h b/third_party/WebKit/Source/core/dom/ScriptLoader.h
index 0af9f42207b646730c77b8892d331bb89e8dd288..1fc84c7d39320a3a0b4440fed9290ee55fa85480 100644
--- a/third_party/WebKit/Source/core/dom/ScriptLoader.h
+++ b/third_party/WebKit/Source/core/dom/ScriptLoader.h
@@ -50,6 +50,8 @@ public:
     Element* element() const { return m_element; }
 
     enum LegacyTypeSupport { DisallowLegacyTypeInTypeAttribute, AllowLegacyTypeInTypeAttribute };
+    static bool isValidScriptTypeAndLanguage(const String& typeAttributeValue, const String& languageAttributeValue, LegacyTypeSupport supportLegacyTypes);
+
     bool prepareScript(const TextPosition& scriptStartPosition = TextPosition::minimumPosition(), LegacyTypeSupport = DisallowLegacyTypeInTypeAttribute);
 
     String scriptCharset() const { return m_characterEncoding; }