Avoid using language hint in encoding detection

third_party/WebKit/Source/platform/text/TextEncodingDetector.cpp

Index: third_party/WebKit/Source/platform/text/TextEncodingDetector.cpp
diff --git a/third_party/WebKit/Source/platform/text/TextEncodingDetector.cpp b/third_party/WebKit/Source/platform/text/TextEncodingDetector.cpp
index d32e81d2f1b970a90f46d191efb891050c237923..7bf6e0c513dbe2997361db54ac1941d70cf7e21d 100644
--- a/third_party/WebKit/Source/platform/text/TextEncodingDetector.cpp
+++ b/third_party/WebKit/Source/platform/text/TextEncodingDetector.cpp
@@ -43,8 +43,12 @@ bool detectTextEncoding(const char* data,
                         const char* hintUserLanguage,
                         WTF::TextEncoding* detectedEncoding) {
   *detectedEncoding = WTF::TextEncoding();
-  Language language;
-  LanguageFromCode(hintUserLanguage, &language);
+  // In general, do not use language hint. This helps get more
+  // deterministic encoding detection results across devices. Note that local
+  // file resources can still benefit from the hint.
+  Language language = UNKNOWN_LANGUAGE;
+  if (hintUrl.protocol() == "file")
+    LanguageFromCode(hintUserLanguage, &language);
   int consumedBytes;
   bool isReliable;
   Encoding encoding = CompactEncDet::DetectEncoding(