MacViews a11y: Allow accessibility clients to set the AXValue on some controls.

ui/views/accessibility/native_view_accessibility_auralinux.cc

 // Copyright 2015 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.
 
 #include "ui/views/accessibility/native_view_accessibility_auralinux.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 95 matching lines @@
     return gfx::kNullAcceleratedWidget;
   }
 
   void DoDefaultAction() override {
   }
 
   bool SetStringValue(const base::string16& new_value) override {
     return false;
   }
 
+  bool CanSetStringValue() override { return false; }
+
  private:
   friend struct base::DefaultSingletonTraits<AuraLinuxApplication>;
 
   AuraLinuxApplication()
       : platform_node_(ui::AXPlatformNode::Create(this)) {
     data_.role = ui::AX_ROLE_APPLICATION;
     if (ViewsDelegate::GetInstance()) {
       data_.AddStringAttribute(
           ui::AX_ATTR_NAME,
           ViewsDelegate::GetInstance()->GetApplicationName());
@@ skipping 37 matching lines @@
 }
 
 gfx::NativeViewAccessible NativeViewAccessibilityAuraLinux::GetParent() {
   gfx::NativeViewAccessible parent = NativeViewAccessibility::GetParent();
   if (!parent)
     parent = AuraLinuxApplication::GetInstance()->GetNativeViewAccessible();
   return parent;
 }
 
 }  // namespace views