Add and specify Views::Textfield::SelectAll |reversed| flag, etc.

ui/views/controls/textfield/textfield.h

Index: ui/views/controls/textfield/textfield.h
diff --git a/ui/views/controls/textfield/textfield.h b/ui/views/controls/textfield/textfield.h
index 39bc4a0052ec1ba626a3aa95bd1d90b469c52b7a..224169bffe332f2044b38422afd299f932556434 100644
--- a/ui/views/controls/textfield/textfield.h
+++ b/ui/views/controls/textfield/textfield.h
@@ -88,8 +88,10 @@ class VIEWS_EXPORT Textfield : public View {
   // Returns the text that is currently selected.
   string16 GetSelectedText() const;
 
-  // Causes the edit field to be fully selected.
-  void SelectAll();
+  // Select the entire text range. If |reversed| is true, the range will end at
+  // the logical beginning of the text; this generally shows the leading portion
+  // of text that overflows its display area.
+  void SelectAll(bool reversed);
 
   // Clears the selection within the edit field and sets the caret to the end.
   void ClearSelection() const;