athena: Replace NOTREACHED with NOTIMPLEMENTED.

chrome/browser/extensions/extension_tab_util_athena.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/browser/extensions/extension_tab_util.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/tabs/tabs_constants.h"
 #include "url/gurl.h"
@@ skipping 102 matching lines @@
 bool ExtensionTabUtil::GetTabStripModel(const WebContents* web_contents,
                                         TabStripModel** tab_strip_model,
                                         int* tab_index) {
   NOTIMPLEMENTED();
   return false;
 }
 
 bool ExtensionTabUtil::GetDefaultTab(Browser* browser,
                                      WebContents** contents,
                                      int* tab_id) {
-  NOTREACHED();
+  NOTIMPLEMENTED();
   return false;
 }
 
 bool ExtensionTabUtil::GetTabById(int tab_id,
                                   content::BrowserContext* browser_context,
                                   bool include_incognito,
                                   Browser** browser,
                                   TabStripModel** tab_strip,
                                   WebContents** contents,
                                   int* tab_index) {
-  NOTREACHED();  return false;
+  NOTIMPLEMENTED();
+  return false;
 }
 
 GURL ExtensionTabUtil::ResolvePossiblyRelativeURL(const std::string& url_string,
                                                   const Extension* extension) {
   // TODO(oshima): Move this to common impl.
   return GURL(url_string);
 }
 
 bool ExtensionTabUtil::IsCrashURL(const GURL& url) {
   // TODO(oshima): Move this to common impl.
@@ skipping 20 matching lines @@
   NOTIMPLEMENTED();
   return NULL;
 }
 
 void ExtensionTabUtil::OpenOptionsPage(const Extension* extension,
                                        Browser* browser) {
   // NOTIMPLEMENTED();
 }
 
 }  // namespace extensions