Implement put_accvalue for textfields and location bar.

ui/views/controls/textfield/textfield.h

Index: ui/views/controls/textfield/textfield.h
diff --git a/ui/views/controls/textfield/textfield.h b/ui/views/controls/textfield/textfield.h
index 4b453cb48a32a5ff59ff05dd7c9aef00cf255c1a..e5b46f03a5c0cbc95a6566f4c9f305f7a4f4d0f6 100644
--- a/ui/views/controls/textfield/textfield.h
+++ b/ui/views/controls/textfield/textfield.h
@@ -9,6 +9,7 @@
 
 #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"
@@ -41,7 +42,9 @@ 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[];
@@ -285,6 +288,11 @@ class VIEWS_EXPORT Textfield : public View {
   // 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_;