Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/browser/extensions/api/runtime/runtime_api.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/api/runtime/runtime_api.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 103 matching lines @@
 }
 
 void SetUninstallUrl(ExtensionPrefs* prefs,
                      const std::string& extension_id,
                      const std::string& url_string) {
   prefs->UpdateExtensionPref(extension_id,
                              kUninstallUrl,
                              new base::StringValue(url_string));
 }
 
+#if defined(ENABLE_EXTENSIONS)
 std::string GetUninstallUrl(ExtensionPrefs* prefs,
                             const std::string& extension_id) {
   std::string url_string;
   prefs->ReadPrefAsString(extension_id, kUninstallUrl, &url_string);
   return url_string;
 }
+#endif  // defined(ENABLE_EXTENSIONS)
 
 }  // namespace
 
 // static
 void RuntimeEventRouter::DispatchOnStartupEvent(
     content::BrowserContext* context, const std::string& extension_id) {
   // TODO(jamescook): Convert to BrowserContext all the way down.
   Profile* profile = static_cast<Profile*>(context);
   DispatchOnStartupEventImpl(profile, extension_id, true, NULL);
 }
@@ skipping 304 matching lines @@
       content::ChildProcessSecurityPolicy::GetInstance();
   policy->GrantReadFileSystem(renderer_id, filesystem_id);
   base::DictionaryValue* dict = new base::DictionaryValue();
   SetResult(dict);
   dict->SetString("fileSystemId", filesystem_id);
   dict->SetString("baseName", relative_path);
   return true;
 }
 
 }   // namespace extensions