Move DOM-inspecting language detection logic to Blink.

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

Index: third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h
diff --git a/third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h b/third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h
index 8c3269ea55d8f15dc7066c2879a0760558690fc3..c4241b43aa8f2bb45a67f808b038b5e385bac451 100644
--- a/third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h
+++ b/third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h
@@ -6,15 +6,21 @@
 #define DocumentStatisticsCollector_h
 
 #include "core/CoreExport.h"
+#include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 class Document;
+class LocalFrame;
 struct WebDistillabilityFeatures;
+struct WebLanguageDetectionDetails;
 
 class CORE_EXPORT DocumentStatisticsCollector {
 public:
-    static WebDistillabilityFeatures collectStatistics(Document&);
+    static WebDistillabilityFeatures collectDistillabilityFeatures(Document&);
+    static WebLanguageDetectionDetails collectLanguageDetectionDetails(Document&);
+    // TODO(dglazkov): This function is not compatible with OOPIF. Deprecate and remove it.
+    static void frameTreeContentAsPlainText(size_t maxChars, LocalFrame*, StringBuilder& output);
 };
 
 } // namespace blink