Implement put_accvalue for textfields and location bar.

ui/views/controls/textfield/textfield.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_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/gfx/font_list.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/text_constants.h"
 #include "ui/views/controls/textfield/native_textfield_wrapper.h"
@@ skipping 12 matching lines @@
 class TextInputClient;
 }  // namespace ui
 
 namespace views {
 
 class ImageView;
 
 class TextfieldController;
 
 // This class implements a View that wraps a native text (edit) field.
-class VIEWS_EXPORT Textfield : public View {
+class VIEWS_EXPORT Textfield
+    : public View,
+      public base::SupportsWeakPtr<Textfield> {
  public:
   // The textfield's class name.
   static const char kViewClassName[];
 
   enum StyleFlags {
     STYLE_DEFAULT   = 0,
     STYLE_OBSCURED  = 1 << 0,
     STYLE_LOWERCASE = 1 << 1
   };
 
@@ skipping 223 matching lines @@
       const ViewHierarchyChangedDetails& details) OVERRIDE;
   virtual const char* GetClassName() const OVERRIDE;
 
   // The object that actually implements the native text field.
   NativeTextfieldWrapper* native_wrapper_;
 
  private:
   // Returns the insets to the rectangle where text is actually painted.
   gfx::Insets GetTextInsets() const;
 
+  // Handles a request to change the value of this text field from software
+  // using an accessibility API (typically automation software, screen readers
+  // don't normally use this). Sets the value and clears the selection.
+  void AccessibilitySetValue(const string16& new_value);
+
   // This is the current listener for events from this Textfield.
   TextfieldController* controller_;
 
   // The mask of style options for this Textfield.
   StyleFlags style_;
 
   // The fonts used to render the text in the Textfield.
   gfx::FontList font_list_;
 
   // The text displayed in the Textfield.
@@ skipping 45 matching lines @@
 
   // The duration to reveal the last typed char for obscured textfields.
   base::TimeDelta obscured_reveal_duration_;
 
   DISALLOW_COPY_AND_ASSIGN(Textfield);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_