Context menus for text fields in platform apps should show available actions (copy, paste, etc).

chrome/browser/tab_contents/render_view_context_menu.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 <algorithm>
 #include <set>
 #include <utility>
 
 #include "chrome/browser/tab_contents/render_view_context_menu.h"
 
@@ skipping 640 matching lines @@
 
   return system->process_manager()->GetExtensionForRenderViewHost(
       source_web_contents_->GetRenderViewHost());
 }
 
 void RenderViewContextMenu::AppendPlatformAppItems() {
   const Extension* platform_app = GetExtension();
   DCHECK(platform_app);
   DCHECK(platform_app->is_platform_app());
 
+  bool has_selection = !params_.selection_text.empty();
+
+  // Add undo/redo, cut/copy/paste etc for text fields
+  if (params_.is_editable)
+    AppendEditableItems();
+  else if (has_selection)
+    AppendCopyItem();
+
   int index = 0;
   AppendExtensionItems(platform_app->id(), &index);
 
   // Add dev tools for unpacked extensions.
   if (platform_app->location() == Extension::LOAD) {
     menu_model_.AddItemWithStringId(IDC_RELOAD, IDS_CONTENT_CONTEXT_RELOAD);
     AppendDeveloperItems();
   }
 }
 
@@ skipping 1344 matching lines @@
   source_web_contents_->GetRenderViewHost()->
       ExecuteMediaPlayerActionAtLocation(location, action);
 }
 
 void RenderViewContextMenu::PluginActionAt(
     const gfx::Point& location,
     const WebPluginAction& action) {
   source_web_contents_->GetRenderViewHost()->
       ExecutePluginActionAtLocation(location, action);
 }