MacViews: Fix behavior of move and select commands when selection direction changes.

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 542c8c301800b6d18a85fe93daee2441b238a69b..bf85f026e80a0fae219196cbbd3666566f7beb64 100644
--- a/ui/views/style/platform_style.h
+++ b/ui/views/style/platform_style.h
@@ -8,6 +8,7 @@
 #include <memory>
 
 #include "base/macros.h"
+#include "ui/gfx/text_constants.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/custom_button.h"
 #include "ui/views/controls/combobox/combobox.h"
@@ -49,6 +50,14 @@ class VIEWS_EXPORT PlatformStyle {
   // The menu button's action to show the menu.
   static const CustomButton::NotifyAction kMenuNotifyActivationAction;
 
+  // The default behavior for word text selection commands, when the selection
+  // direction is reversed.
+  static const gfx::SelectionReversedBehavior kWordSelectionBehavior;
+
+  // The default behavior for line text selection commands, when the selection
+  // direction is reversed.
+  static const gfx::SelectionReversedBehavior kLineSelectionBehavior;
+
   // 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