Implementing directional selection strategy in Blink.

public/web/WebSettings.h

Index: public/web/WebSettings.h
diff --git a/public/web/WebSettings.h b/public/web/WebSettings.h
index 49cadb4e69ede162196cb4c2d2cc14c3cbb3cb8c..1b6d78af91fd16308340e4277c399ba20dbd254b 100644
--- a/public/web/WebSettings.h
+++ b/public/web/WebSettings.h
@@ -93,6 +93,11 @@ public:
         HoverTypeHover = 1 << 2
     };
 
+    enum SelectionStrategyType {
+        StrategyDefault,
+        StrategyDirection
+    };
+
     virtual bool mainFrameResizesAreOrientationChanges() const = 0;
     virtual int availablePointerTypes() const = 0;
     virtual PointerType primaryPointerType() const = 0;
@@ -202,6 +207,7 @@ public:
     virtual void setSansSerifFontFamily(const WebString&, UScriptCode = USCRIPT_COMMON) = 0;
     virtual void setSelectTrailingWhitespaceEnabled(bool) = 0;
     virtual void setSelectionIncludesAltImageText(bool) = 0;
+    virtual void setSelectionStrategy(SelectionStrategyType) = 0;
     virtual void setSerifFontFamily(const WebString&, UScriptCode = USCRIPT_COMMON) = 0;
     virtual void setShouldPrintBackgrounds(bool) = 0;
     virtual void setShouldClearDocumentBackground(bool) = 0;