CHR-1796: Implement UIATextProvider::get_Value method.

ui/base/win/accessibility_misc_utils.h

 // Copyright (c) 2012 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 UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_
 #define UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <UIAutomationCore.h>
 
 #include "base/compiler_specific.h"
+#include "base/strings/string16.h"
 #include "ui/base/ui_base_export.h"
 
 namespace base {
 namespace win {
 
   // UIA Text provider implementation for edit controls.
 class UI_BASE_EXPORT UIATextProvider
     : public NON_EXPORTED_BASE(CComObjectRootEx<CComMultiThreadModel>),
       public IValueProvider,
       public ITextProvider {
  public:
   BEGIN_COM_MAP(UIATextProvider)
     COM_INTERFACE_ENTRY2(IUnknown, ITextProvider)
     COM_INTERFACE_ENTRY(IValueProvider)
     COM_INTERFACE_ENTRY(ITextProvider)
   END_COM_MAP()
 
   UIATextProvider();
 
   // Creates an instance of the UIATextProvider class.
   // Returns true on success
-  static bool CreateTextProvider(bool editable, IUnknown** provider);
+  static bool CreateTextProvider(const string16& value,
+                                 bool editable,
+                                 IUnknown** provider);
 
   void set_editable(bool editable) {
     editable_ = editable;
   }
 
+  void set_value(const string16& value) { value_ = value; }
+
   //
   // IValueProvider methods.
   //
   STDMETHOD(get_IsReadOnly)(BOOL* read_only);
 
   //
   // IValueProvider methods not implemented.
   //
   STDMETHOD(SetValue)(const wchar_t* val) {
     return E_NOTIMPL;
   }
 
-  STDMETHOD(get_Value)(BSTR* value) {
-    return E_NOTIMPL;
-  }
+  STDMETHOD(get_Value)(BSTR* value);
 
   //
   // ITextProvider methods.
   //
   STDMETHOD(GetSelection)(SAFEARRAY** ret) {
     return E_NOTIMPL;
   }
 
   STDMETHOD(GetVisibleRanges)(SAFEARRAY** ret) {
     return E_NOTIMPL;
@@ skipping 12 matching lines @@
   STDMETHOD(get_DocumentRange)(ITextRangeProvider** ret) {
     return E_NOTIMPL;
   }
 
   STDMETHOD(get_SupportedTextSelection)(enum SupportedTextSelection* ret) {
     return E_NOTIMPL;
   }
 
  private:
   bool editable_;
+  string16 value_;
 };
 
 }  // win
 }  // base
 
 #endif  // UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_