Android: Do not build any extensions code except for extensions_constants.

extensions/common/extension_api_stub.cc

-// Copyright 2013 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.
-
-// Stub methods to be used when extensions are disabled
-// i.e. ENABLE_EXTENSIONS is not defined
-
-#include "extensions/common/extension_api.h"
-
-#include "extensions/common/features/feature.h"
-#include "url/gurl.h"
-
-namespace extensions {
-
-// static
-ExtensionAPI* ExtensionAPI::GetSharedInstance() {
-  return NULL;
-}
-
-// static
-ExtensionAPI* ExtensionAPI::CreateWithDefaultConfiguration() {
-  return NULL;
-}
-
-Feature::Availability ExtensionAPI::IsAvailable(
-    const std::string& api_full_name,
-    const Extension* extension,
-    Feature::Context context,
-    const GURL& url) {
-  return Feature::CreateAvailability(Feature::NOT_PRESENT, "");
-}
-
-bool ExtensionAPI::IsAnyFeatureAvailableToContext(const Feature& api,
-                                                  const Extension* extension,
-                                                  Feature::Context context,
-                                                  const GURL& url) {
-  return false;
-}
-
-bool ExtensionAPI::IsAvailableInUntrustedContext(const std::string& full_name,
-                                                 const Extension* extension) {
-  return false;
-}
-
-bool ExtensionAPI::IsAvailableToWebUI(const std::string& name,
-                                      const GURL& url) {
-  return false;
-}
-
-const base::DictionaryValue* ExtensionAPI::GetSchema(
-    const std::string& full_name) {
-  return NULL;
-}
-
-Feature* ExtensionAPI::GetFeatureDependency(const std::string& name) {
-  return NULL;
-}
-
-}  // namespace extensions