Mask the value of passwords in accessible value.

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index 6e0dc0d19b369e28d75105b131b203ce7e6aac69..ca39c99c49aac957362be449e6fbe36647eb69a9 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -914,10 +914,12 @@ void Textfield::GetAccessibleState(ui::AXViewState* state) {
   state->name = accessible_name_;
   if (read_only())
     state->AddStateFlag(ui::AX_STATE_READ_ONLY);
-  if (text_input_type_ == ui::TEXT_INPUT_TYPE_PASSWORD)
+  if (text_input_type_ == ui::TEXT_INPUT_TYPE_PASSWORD) {
     state->AddStateFlag(ui::AX_STATE_PROTECTED);
-  state->value = text();
-
+    state->value = base::string16(text().size(), '*');
+  } else {
+    state->value = text();
+  }
   const gfx::Range range = GetSelectedRange();
   state->selection_start = range.start();
   state->selection_end = range.end();