Using ui::test::EventGenerator

ui/views/style/platform_style.h

Index: ui/views/style/platform_style.h
diff --git a/ui/views/style/platform_style.h b/ui/views/style/platform_style.h
index 36bc1fcfd28c6a321b40754d2eff5996013ce202..ee9941ea8746fac6e24b5513864a3803a6866e94 100644
--- a/ui/views/style/platform_style.h
+++ b/ui/views/style/platform_style.h
@@ -33,6 +33,10 @@ class VIEWS_EXPORT PlatformStyle {
   // Whether dialog-default buttons are given a bold font style.
   static const bool kDefaultLabelButtonHasBoldFont;
 
+  // True if dragging vertically above or below a textfield's bounds selects to
+  // the beginning or end of the text from the cursor, respectively.
+  static const bool kTextfieldDragVerticallyDragsToEnd;
+
   // Creates an ImageSkia containing the image to use for the combobox arrow.
   // The |is_enabled| argument is true if the control the arrow is for is
   // enabled, and false if the control is disabled. The |style| argument is the