Introduce minimum threshold

src/typings/jschardet.d.ts

@@ -4,4 +4,8 @@ declare module 'jschardet' {
 		confidence: number
 	}
 	export function detect(buffer: NodeBuffer): IDetectedMap;
+
+	export const Constants: {
+		MINIMUM_THRESHOLD: number,
+	}
 }
\ No newline at end of file

src/vs/base/node/encoding.ts

@@ -95,7 +95,11 @@ export function detectEncodingByBOM(file: string): TPromise<string> {
 	return stream.readExactlyByFile(file, 3).then(({ buffer, bytesRead }) => detectEncodingByBOMFromBuffer(buffer, bytesRead));
 }
 
+const MINIMUM_THRESHOLD = 0.2; //Todo. Decide how much this should be.
+
 const IGNORE_ENCODINGS = ['ascii', 'utf-8', 'utf-16', 'utf-32'];
+
+jschardet.Constants.MINIMUM_THRESHOLD = MINIMUM_THRESHOLD;
 /**
  * Guesses the encoding from buffer.
  */