Add a virtual keyboard webui at chrome://keyboard/

chrome/common/extensions/manifest_url_handler.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 "chrome/common/extensions/manifest_url_handler.h"
 
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_util.h"
@@ skipping 255 matching lines @@
                         page != chrome::kChromeUIHistoryHost);
 #if defined(OS_CHROMEOS)
     is_override = (is_override &&
                    page != chrome::kChromeUIActivationMessageHost);
 #endif
 #if defined(FILE_MANAGER_EXTENSION)
     is_override = (is_override &&
                    !(extension->location() == Manifest::COMPONENT &&
                      page == chrome::kChromeUIFileManagerHost));
 #endif
+    // FIXME(bryeung): figure out where this should be enabled
+    is_override = (is_override &&
+                   page != chrome::kChromeUIVirtualKeyboardHost);
 
     if (is_override || !iter.value().GetAsString(&val)) {
       *error = ASCIIToUTF16(errors::kInvalidChromeURLOverrides);
       return false;
     }
     // Replace the entry with a fully qualified chrome-extension:// URL.
     url_overrides->chrome_url_overrides_[page] = extension->GetResourceURL(val);
 
     // For component extensions, add override URL to extent patterns.
     if (extension->is_legacy_packaged_app() &&
@@ skipping 18 matching lines @@
   extension->SetManifestData(keys::kChromeURLOverrides,
                              url_overrides.release());
   return true;
 }
 
 const std::vector<std::string> URLOverridesHandler::Keys() const {
   return SingleKey(keys::kChromeURLOverrides);
 }
 
 }  // namespace extensions