Disable the context menu on the keyboard overlay and the print dialog.

chrome/browser/ui/views/keyboard_overlay_delegate.cc

 // Copyright (c) 2011 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/ui/views/keyboard_overlay_delegate.h"
 
 #include <algorithm>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
@@ skipping 56 matching lines @@
   return;
 }
 
 void KeyboardOverlayDelegate::OnCloseContents(TabContents* source,
                                               bool* out_close_dialog) {
 }
 
 bool KeyboardOverlayDelegate::ShouldShowDialogTitle() const {
   return false;
 }
+
+bool KeyboardOverlayDelegate::HandleContextMenu(
+    const ContextMenuParams& params) {
+  return true;
+}