Componentize safe_browsing [+1]: move protos to component

components/safe_browsing/BUILD.gn

 # Copyright 2016 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("//third_party/protobuf/proto_library.gni")
-
-proto_library("csd_proto") {
-  sources = [
-    "csd.proto",
-  ]
-}
-
 source_set("safe_browsing") {
   sources = [
     "base_blocking_page.cc",
     "base_blocking_page.h",
     "base_resource_throttle.cc",
     "base_resource_throttle.h",
     "base_ui_manager.cc",
     "base_ui_manager.h",
   ]
 
@@ skipping 39 matching lines @@
   ]
 
   deps = [
     ":base_ping_manager",
     "//base:base",
     "//net:net",
     "//net:test_support",
     "//testing/gtest",
   ]
 }