MacViews/a11y: Allow accessibility clients to update the selected text.

chrome/browser/ui/views/omnibox/omnibox_view_views.h

Index: chrome/browser/ui/views/omnibox/omnibox_view_views.h
diff --git a/chrome/browser/ui/views/omnibox/omnibox_view_views.h b/chrome/browser/ui/views/omnibox/omnibox_view_views.h
index 2f45573895bc57c1b8bd62c20f7a5c57fcd8ad73..a004c90d3e87a55f6ed160871db92151026eeef4 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_view_views.h
+++ b/chrome/browser/ui/views/omnibox/omnibox_view_views.h
@@ -127,8 +127,11 @@ class OmniboxViewViews
 
   // Handles a request to change the value of this text field from software
   // using an accessibility API (typically automation software, screen readers
-  // don't normally use this). Sets the value and clears the selection.
-  void AccessibilitySetValue(const base::string16& new_value);
+  // don't normally use this). If |clear_first| is true, clears the existing
+  // value first and sets it to |new_value|. If false, deletes whatever's
+  // selected and replaces it with |new_value|. The cursor is then placed at the
+  // end of |new_value|.
+  void AccessibilitySetValue(const base::string16& new_value, bool clear_first);
 
   // Updates |security_level_| based on the toolbar model's current value.
   void UpdateSecurityLevel();