Don't build the task manager into Android builds.

chrome/browser/extensions/extension_service.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_service.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 517 matching lines @@
   browser_event_router_.reset(new ExtensionBrowserEventRouter(profile_));
   browser_event_router_->Init();
   preference_event_router_.reset(new ExtensionPreferenceEventRouter(profile_));
   bookmark_event_router_.reset(new BookmarkExtensionEventRouter(
       profile_->GetBookmarkModel()));
   bookmark_event_router_->Init();
   cookies_event_router_.reset(new ExtensionCookiesEventRouter(profile_));
   cookies_event_router_->Init();
   management_event_router_.reset(new ExtensionManagementEventRouter(profile_));
   management_event_router_->Init();
+#if defined(ENABLE_TASK_MANAGER)
   ExtensionProcessesEventRouter::GetInstance()->ObserveProfile(profile_);
+#endif
   web_navigation_event_router_.reset(
       new ExtensionWebNavigationEventRouter(profile_));
   web_navigation_event_router_->Init();
 
 #if defined(OS_CHROMEOS)
   file_browser_event_router_.reset(
       new ExtensionFileBrowserEventRouter(profile_));
   file_browser_event_router_->ObserveFileSystemEvents();
 
   input_method_event_router_.reset(
@@ skipping 2119 matching lines @@
   return api_resource_controller_;
 }
 
 extensions::RulesRegistryService* ExtensionService::GetRulesRegistryService() {
   if (!rules_registry_service_.get()) {
     rules_registry_service_.reset(
         new extensions::RulesRegistryService(profile_));
   }
   return rules_registry_service_.get();
 }