Convert some component source sets to static library

components/crash/content/app/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.
 
 assert(!is_ios)
 if (is_android) {
   import("//build/config/android/config.gni")
 }
 
 static_library("lib") {
@@ skipping 128 matching lines @@
   }
 }
 
 # TODO(mark): https://crbug.com/466890: remove this target.
 #
 # This is a temporary target provided for Mac Breakpad users that have not
 # yet migrated to Crashpad (namely content_shell). This target will be
 # removed shortly and all consumers will be expected to use Crashpad as
 # the Mac crash-reporting client. See the comment in the
 # crash_component_non_mac target for more details.
-source_set("app_breakpad_mac_win_to_be_deleted") {
+static_library("app_breakpad_mac_win_to_be_deleted") {
   deps = [
     ":app_non_mac_win",
   ]
 
   if (is_mac || is_win) {
     sources = [
       "breakpad_mac.h",
       "breakpad_mac.mm",
       "breakpad_win.cc",
       "breakpad_win.h",
@@ skipping 18 matching lines @@
     }
 
     if (is_win) {
       deps += [ "//breakpad:breakpad_handler" ]
       libs = [ "userenv.lib" ]
     }
   }
 }
 
 if (is_mac) {
-  source_set("breakpad_stubs") {
+  static_library("breakpad_stubs") {
     sources = [
       "breakpad_mac.h",
       "breakpad_mac_stubs.mm",
       "crash_reporter_client.cc",
       "crash_reporter_client.h",
     ]
     deps = [
       "//base",
     ]
   }
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "crash_keys_win_unittest.cc",
   ]
   deps = [
     ":lib",
     "//base",
     "//testing/gmock",
     "//testing/gtest",
   ]
 
   if (is_win) {
     deps += [ "//breakpad:client" ]
   }
 }