First pass at experimental omnibox API. There are plenty of rough edges and

chrome/browser/search_engines/template_url.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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/search_engines/template_url.h"
 
 #include "app/l10n_util.h"
 #include "base/i18n/icu_string_conversions.h"
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/google_url_tracker.h"
 #include "chrome/browser/search_engines/template_url_model.h"
+#include "chrome/common/url_constants.h"
 #include "gfx/favicon_size.h"
 #include "net/base/escape.h"
 
 #if defined(OS_WIN)
 #include "chrome/browser/rlz/rlz.h"
 #endif
 
 // The TemplateURLRef has any number of terms that need to be replaced. Each of
 // the terms is enclosed in braces. If the character preceeding the final
 // brace is a ?, it indicates the term is optional and can be replaced with
@@ skipping 589 matching lines @@
 }
 
 void TemplateURL::InvalidateCachedValues() const {
   url_.InvalidateCachedValues();
   suggestions_url_.InvalidateCachedValues();
   if (autogenerate_keyword_) {
     keyword_.clear();
     keyword_generated_ = false;
   }
 }
+
+std::string TemplateURL::GetExtensionId() const {
+  DCHECK(IsExtensionKeyword());
+  return GURL(WideToUTF8(url_.url())).host();
+}
+
+bool TemplateURL::IsExtensionKeyword() const {
+  return GURL(WideToUTF8(url_.url())).SchemeIs(chrome::kExtensionScheme);
+}