Variety of tweaks to View API.

views/window/dialog_client_view.cc

Index: views/window/dialog_client_view.cc
===================================================================
--- views/window/dialog_client_view.cc	(revision 86085)
+++ views/window/dialog_client_view.cc	(working copy)
@@ -139,7 +139,7 @@
     ok_button_ = new DialogButton(this, window(),
                                   MessageBoxFlags::DIALOGBUTTON_OK, label,
                                   is_default_button);
-    ok_button_->SetGroup(kButtonGroup);
+    ok_button_->set_group(kButtonGroup);
     if (is_default_button)
       default_button_ = ok_button_;
     if (!(buttons & MessageBoxFlags::DIALOGBUTTON_CANCEL))
@@ -163,7 +163,7 @@
     cancel_button_ = new DialogButton(this, window(),
                                       MessageBoxFlags::DIALOGBUTTON_CANCEL,
                                       label, is_default_button);
-    cancel_button_->SetGroup(kButtonGroup);
+    cancel_button_->set_group(kButtonGroup);
     cancel_button_->AddAccelerator(Accelerator(ui::VKEY_ESCAPE,
                                                false, false, false));
     if (is_default_button)
@@ -531,7 +531,7 @@
   View* extra_view = GetDialogDelegate()->GetExtraView();
   if (extra_view && !extra_view_) {
     extra_view_ = extra_view;
-    extra_view_->SetGroup(kButtonGroup);
+    extra_view_->set_group(kButtonGroup);
     AddChildView(extra_view_);
     size_extra_view_height_to_buttons_ =
         GetDialogDelegate()->GetSizeExtraViewHeightToButtons();