mac: drop NOTIMPLEMENTED in GotFocus()...

chrome/browser/tab_contents/tab_contents_view_gtk.cc

 // Copyright (c) 2009 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 "chrome/browser/tab_contents/tab_contents_view_gtk.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
@@ skipping 531 matching lines @@
   else
     SetInitialFocus();
 }
 
 void TabContentsViewGtk::UpdateDragCursor(WebDragOperation operation) {
   drag_dest_->UpdateDragStatus(operation);
 }
 
 void TabContentsViewGtk::GotFocus() {
   // This is only used in the views FocusManager stuff but it bleeds through
-  // all subclasses.
+  // all subclasses. http://crbug.com/21875
 }
 
 // This is called when we the renderer asks us to take focus back (i.e., it has
 // iterated past the last focusable element on the page).
 void TabContentsViewGtk::TakeFocus(bool reverse) {
   gtk_widget_child_focus(GTK_WIDGET(GetTopLevelNativeWindow()),
       reverse ? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD);
 }
 
 void TabContentsViewGtk::HandleKeyboardEvent(
@@ skipping 132 matching lines @@
     gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                      widget, "x", &value);
 
     int child_y = std::max(half_view_height - (requisition.height / 2), 0);
     g_value_set_int(&value, child_y);
     gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                      widget, "y", &value);
     g_value_unset(&value);
   }
 }