Convert some component source sets to static library

components/invalidation/impl/BUILD.gn

 # Copyright 2014 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.
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
-source_set("impl") {
+static_library("impl") {
   sources = [
     "invalidation_logger.cc",
     "invalidation_logger.h",
     "invalidation_logger_observer.h",
     "invalidation_prefs.cc",
     "invalidation_prefs.h",
     "invalidation_service_util.cc",
     "invalidation_service_util.h",
     "invalidation_state_tracker.cc",
     "invalidation_state_tracker.h",
@@ skipping 227 matching lines @@
       "//base:base_java_test_support",
     ]
   }
   generate_jni("jni_headers") {
     sources = [
       "android/java/src/org/chromium/components/invalidation/InvalidationService.java",
     ]
     jni_package = "components/invalidation"
   }
 }