Don't expose Android set selection accessibility action for empty text fields

content/browser/accessibility/browser_accessibility_android.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_ANDROID_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_ANDROID_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 33 matching lines @@
   bool IsPassword() const;
   bool IsRangeType() const;
   bool IsScrollable() const;
   bool IsSelected() const;
   bool IsSlider() const;
   bool IsVisibleToUser() const;
 
   bool CanOpenPopup() const;
 
   bool HasFocusableChild() const;
+  bool HasNonEmptyValue() const;
 
   const char* GetClassName() const;
   base::string16 GetText() const override;
 
   base::string16 GetRoleDescription() const;
 
   int GetItemIndex() const;
   int GetItemCount() const;
 
   bool CanScrollForward() const;
@@ skipping 80 matching lines @@
   bool first_time_;
   base::string16 old_value_;
   base::string16 new_value_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_ANDROID_H_