Finch experiment: auto-detect text encoding

third_party/WebKit/Source/core/html/parser/TextResourceDecoder.h

Index: third_party/WebKit/Source/core/html/parser/TextResourceDecoder.h
diff --git a/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.h b/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.h
index 2539cc8a68577c5e20da2b757637e3e510931e27..ad167e2a128fbd956a7d430de0629e8af4251dd2 100644
--- a/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.h
+++ b/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.h
@@ -37,6 +37,7 @@ class CORE_EXPORT TextResourceDecoder {
 public:
     enum EncodingSource {
         DefaultEncoding,
+        DefaultEncodingAttemptedSniffing,
         AutoDetectedEncoding,
         EncodingFromContentSniffing,
         EncodingFromXMLHeader,
@@ -57,6 +58,18 @@ public:
     bool encodingWasDetectedHeuristically() const
     {
         return m_source == AutoDetectedEncoding
+            || m_source == EncodingFromContentSniffing
+            || m_source == DefaultEncodingAttemptedSniffing;
+    }
+
+    bool encodingWasDetectedFromContentSniffing() const
+    {
+        return m_source == EncodingFromContentSniffing;
+    }
+
+    bool attemptedToDetermineEncodingFromContentSniffing() const
+    {
+        return m_source == DefaultEncodingAttemptedSniffing
             || m_source == EncodingFromContentSniffing;
     }
 
@@ -83,6 +96,7 @@ private:
     bool checkForXMLCharset(const char*, size_t, bool& movedDataToBuffer);
     void checkForMetaCharset(const char*, size_t);
     bool shouldAutoDetect() const;
+    void detectTextEncoding(const char*, size_t);
 
     ContentType m_contentType;
     WTF::TextEncoding m_encoding;