Convert some component source sets to static library

components/data_reduction_proxy/core/browser/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.
 
 browser_sources = [
   "data_reduction_proxy_bypass_protocol.cc",
   "data_reduction_proxy_bypass_protocol.h",
   "data_reduction_proxy_bypass_stats.cc",
   "data_reduction_proxy_bypass_stats.h",
   "data_reduction_proxy_compression_stats.cc",
@@ skipping 33 matching lines @@
   "data_reduction_proxy_tamper_detection.h",
   "data_store.cc",
   "data_store.h",
   "data_usage_store.cc",
   "data_usage_store.h",
   "db_data_owner.cc",
   "db_data_owner.h",
 ]
 
 if (is_android) {
-  source_set("browser_small") {
+  static_library("browser_small") {
     sources = browser_sources
 
     deps = [
       "//base",
       "//components/data_reduction_proxy/core/common",
       "//components/data_reduction_proxy/proto:data_reduction_proxy_proto",
       "//components/pref_registry",
       "//components/prefs",
       "//components/variations",
       "//crypto",
       "//google_apis",
       "//net:net",
       "//url:url",
     ]
   }
 }
 
-source_set("browser") {
+static_library("browser") {
   sources = browser_sources
   sources += [
     "data_store_impl.cc",
     "data_store_impl.h",
   ]
 
   deps = [
     "//base",
     "//components/data_reduction_proxy/core/common",
     "//components/data_reduction_proxy/proto:data_reduction_proxy_proto",
@@ skipping 94 matching lines @@
     "//base/test:test_support",
     "//components/data_reduction_proxy/core/common:test_support",
     "//components/data_reduction_proxy/proto:data_reduction_proxy_proto",
     "//components/prefs:test_support",
     "//components/variations",
     "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }