Move isLegacySupportedJavaScriptLanguage() to MIMETypeRegistry

third_party/WebKit/Source/platform/network/mime/MIMETypeRegistry.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/network/mime/MIMETypeRegistry.h"
 
 #include "base/files/file_path.h"
 #include "base/strings/string_util.h"
 #include "components/mime_util/mime_util.h"
 #include "media/base/mime_util.h"
@@ skipping 108 matching lines @@
   if (equalIgnoringCase(mimeType, "image/webp"))
     return true;
   return false;
 }
 
 bool MIMETypeRegistry::isSupportedJavaScriptMIMEType(const String& mimeType) {
   return mime_util::IsSupportedJavascriptMimeType(
       ToLowerASCIIOrEmpty(mimeType));
 }
 
+bool MIMETypeRegistry::isLegacySupportedJavaScriptLanguage(
+    const String& language) {
+  // Mozilla 1.8 accepts javascript1.0 - javascript1.7, but WinIE 7 accepts only
+  // javascript1.1 - javascript1.3.
+  // Mozilla 1.8 and WinIE 7 both accept javascript and livescript.
+  // WinIE 7 accepts ecmascript and jscript, but Mozilla 1.8 doesn't.
+  // Neither Mozilla 1.8 nor WinIE 7 accept leading or trailing whitespace.
+  // We want to accept all the values that either of these browsers accept, but
+  // not other values.
+
+  // FIXME: This function is not HTML5 compliant. These belong in the MIME
+  // registry as "text/javascript<version>" entries.
+  return equalIgnoringASCIICase(language, "javascript") ||
+         equalIgnoringASCIICase(language, "javascript1.0") ||
+         equalIgnoringASCIICase(language, "javascript1.1") ||
+         equalIgnoringASCIICase(language, "javascript1.2") ||
+         equalIgnoringASCIICase(language, "javascript1.3") ||
+         equalIgnoringASCIICase(language, "javascript1.4") ||
+         equalIgnoringASCIICase(language, "javascript1.5") ||
+         equalIgnoringASCIICase(language, "javascript1.6") ||
+         equalIgnoringASCIICase(language, "javascript1.7") ||
+         equalIgnoringASCIICase(language, "livescript") ||
+         equalIgnoringASCIICase(language, "ecmascript") ||
+         equalIgnoringASCIICase(language, "jscript");
+}
+
 bool MIMETypeRegistry::isSupportedNonImageMIMEType(const String& mimeType) {
   return mime_util::IsSupportedNonImageMimeType(ToLowerASCIIOrEmpty(mimeType));
 }
 
 bool MIMETypeRegistry::isSupportedMediaMIMEType(const String& mimeType,
                                                 const String& codecs) {
   return supportsMediaMIMEType(mimeType, codecs) != IsNotSupported;
 }
 
 MIMETypeRegistry::SupportsType MIMETypeRegistry::supportsMediaMIMEType(
@@ skipping 41 matching lines @@
   String subType = mimeType.substring(fontLen).lower();
   return subType == "woff" || subType == "woff2" || subType == "otf" ||
          subType == "ttf" || subType == "sfnt";
 }
 
 bool MIMETypeRegistry::isSupportedTextTrackMIMEType(const String& mimeType) {
   return equalIgnoringCase(mimeType, "text/vtt");
 }
 
 }  // namespace blink