a11y: Exclude children of nested keyboard accessible controls from a11y tree.

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 572d3a55f0487c33d11ef164b203bcb513cce133..a5293b1afa799f7e6895ec71b5c6c5c344c0cb35 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -779,6 +779,8 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // IMPORTANT NOTE: loops in the focus hierarchy are not supported.
   void SetNextFocusableView(View* view);
 
+  // Returns last set focus behavior.
+  FocusBehavior focus_behavior() const { return focus_behavior_; }
   // Sets |focus_behavior| and advances focus if necessary.
   void SetFocusBehavior(FocusBehavior focus_behavior);
 
@@ -945,6 +947,10 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
 
   // Accessibility -------------------------------------------------------------
 
+  // Gets the NativeViewAccessibility instance for this view, and creates one if
+  // it doesn't yet exist.
+  NativeViewAccessibility* GetNativeViewAccessibility();
+
   // Modifies |state| to reflect the current accessible state of this view.
   virtual void GetAccessibleState(ui::AXViewState* state) { }
 
@@ -1143,9 +1149,6 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
 
   // Focus ---------------------------------------------------------------------
 
-  // Returns last set focus behavior.
-  FocusBehavior focus_behavior() const { return focus_behavior_; }
-
   // Override to be notified when focus has changed either to or from this View.
   virtual void OnFocus();
   virtual void OnBlur();