Views - dialog button defaultness shouldn't follow focus.

ui/views/controls/button/custom_button.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/button/custom_button.h"
 
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ skipping 264 matching lines @@
   }
   SetState(STATE_NORMAL);
   // TODO(beng): remove once NotifyClick takes ui::Event.
   ui::MouseEvent synthetic_event(
       ui::ET_MOUSE_RELEASED, gfx::Point(), gfx::Point(), ui::EventTimeForNow(),
       ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
   NotifyClick(synthetic_event);
   return true;
 }
 
+bool CustomButton::SkipDefaultKeyEventProcessing(const ui::KeyEvent& event) {
+  // If this button is focused and the user presses space or enter, don't let
+  // that be treated as an accelerator.
+  return (event.key_code() == ui::VKEY_SPACE) ||
+         (event.key_code() == ui::VKEY_RETURN);
+}
+
 void CustomButton::ShowContextMenu(const gfx::Point& p,
                                    ui::MenuSourceType source_type) {
   if (!context_menu_controller())
     return;
 
   // We're about to show the context menu. Showing the context menu likely means
   // we won't get a mouse exited and reset state. Reset it now to be sure.
   if (state_ != STATE_DISABLED)
     SetState(STATE_NORMAL);
   View::ShowContextMenu(p, source_type);
@@ skipping 161 matching lines @@
   return GetWidget() && GetWidget()->GetTopLevelWidget() != GetWidget();
 }
 
 bool CustomButton::FocusInChildWidget() const {
   return GetWidget() &&
          GetWidget()->GetRootView()->Contains(
              GetFocusManager()->GetFocusedView());
 }
 
 }  // namespace views