Mask the value of passwords in accessible value.

ui/views/controls/textfield/textfield.cc

 // 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.
 
 #include "ui/views/controls/textfield/textfield.h"
 
 #include <string>
 
 #include "base/trace_event/trace_event.h"
 #include "ui/accessibility/ax_view_state.h"
@@ skipping 896 matching lines @@
 void Textfield::OnDragDone() {
   initiating_drag_ = false;
   drop_cursor_visible_ = false;
 }
 
 void Textfield::GetAccessibleState(ui::AXViewState* state) {
   state->role = ui::AX_ROLE_TEXT_FIELD;
   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();
 
   if (!read_only()) {
     state->set_value_callback =
         base::Bind(&Textfield::AccessibilitySetValue,
                    weak_ptr_factory_.GetWeakPtr());
   }
 }
@@ skipping 938 matching lines @@
       const size_t length = selection_clipboard_text.length();
       range = gfx::Range(range.start() + length, range.end() + length);
     }
     model_->MoveCursorTo(gfx::SelectionModel(range, affinity));
     UpdateAfterChange(true, true);
     OnAfterUserAction();
   }
 }
 
 }  // namespace views