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

ui/accessibility/platform/test_ax_node_wrapper.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 "base/containers/hash_tables.h"
 #include "ui/accessibility/platform/test_ax_node_wrapper.h"
 
 namespace ui {
 
 namespace {
@@ skipping 101 matching lines @@
 }
 
 gfx::AcceleratedWidget
 TestAXNodeWrapper::GetTargetForNativeAccessibilityEvent() {
   return gfx::kNullAcceleratedWidget;
 }
 
 void TestAXNodeWrapper::DoDefaultAction() {
 }
 
-bool TestAXNodeWrapper::SetStringValue(const base::string16& new_value) {
+bool TestAXNodeWrapper::SetStringValue(const base::string16& new_value,
+                                       bool clear_first) {
   return false;
 }
 
 bool TestAXNodeWrapper::CanSetStringValue() {
   return false;
 }
 
 TestAXNodeWrapper::TestAXNodeWrapper(AXTree* tree, AXNode* node)
     : tree_(tree),
       node_(node),
       platform_node_(AXPlatformNode::Create(this)) {
 }
 
 }  // namespace ui