Pull ICU, rename component build GN variables.

build/secondary/third_party/nss/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/linux/pkg_config.gni")
 
 if (is_linux) {
   # This is a dependency on NSS with no libssl. On Linux we use a built-in SSL
   # library but the system NSS libraries. Non-Linux platforms using NSS use the
   # hermetic one in //third_party/nss.
@@ skipping 13 matching lines @@
   include_nss_libpkix = is_ios
 
   config("nspr_config") {
     defines = [ "NO_NSPR_10_SUPPORT" ]
     include_dirs = [
       "nspr/pr/include",
       "nspr/lib/ds",
       "nspr/lib/libc/include",
     ]
 
-    if (component_mode != "shared_library") {
+    if (!is_component_build) {
       defines += [ "NSPR_STATIC" ]
     }
   }
 
   component("nspr") {
     output_name = "crnspr"
     sources = [
       "nspr/lib/ds/plarena.c",
       "nspr/lib/ds/plarena.h",
       "nspr/lib/ds/plarenas.h",
@@ skipping 303 matching lines @@
     ]
 
     public_deps = [
       ":nss_static",
     ]
 
     if (include_nss_root_certs) {
       public_deps += [ ":nssckbi" ]
     }
 
-    if (component_mode == "shared_library") {
+    if (is_component_build) {
       if (is_mac) {
         ldflags = [ "-all_load" ]
       } else if (is_win) {
         # Pass the def file to the linker.
         ldflags =
             [ "/DEF:" + rebase_path("nss/exports_win.def", root_build_dir) ]
       }
     }
   }
 
@@ skipping 833 matching lines @@
     deps = [
       ":nspr",
       "//third_party/sqlite",
     ]
 
     if (is_win && current_cpu == "x86") {
       deps += [ ":nss_static_avx" ]
     }
   }
 }  # Windows/Mac/iOS.