Convert some component source sets to static library

components/bookmarks/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.
 
 import("//build/config/ui.gni")
 
-source_set("browser") {
+static_library("browser") {
   sources = [
     "base_bookmark_model_observer.cc",
     "base_bookmark_model_observer.h",
     "bookmark_client.cc",
     "bookmark_client.h",
     "bookmark_codec.cc",
     "bookmark_codec.h",
     "bookmark_expanded_state_tracker.cc",
     "bookmark_expanded_state_tracker.h",
     "bookmark_index.cc",
@@ skipping 100 matching lines @@
     "//url",
   ]
 
   if (use_x11) {
     deps += [
       "//ui/events/platform/x11",
       "//ui/gfx/x",
     ]
   }
 }