Split //ios/chrome/browser in multiple targets.

ios/chrome/browser/web_resource/BUILD.gn

Index: ios/chrome/browser/web_resource/BUILD.gn
diff --git a/components/client_update_protocol/BUILD.gn b/ios/chrome/browser/web_resource/BUILD.gn
similarity index 61%
copy from components/client_update_protocol/BUILD.gn
copy to ios/chrome/browser/web_resource/BUILD.gn
index e22ee24d20ed545dd95d5243214e42ea5b9b5eb1..2fa083f2901889594e2f6edf00420d2eb0740573 100644
--- a/components/client_update_protocol/BUILD.gn
+++ b/ios/chrome/browser/web_resource/BUILD.gn
@@ -2,28 +2,27 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-static_library("client_update_protocol") {
+source_set("web_resource") {
   sources = [
-    "ecdsa.cc",
-    "ecdsa.h",
+    "web_resource_util.cc",
+    "web_resource_util.h",
   ]
-
   deps = [
     "//base",
-    "//crypto",
+    "//components/web_resource",
+    "//ios/web",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
-    "ecdsa_unittest.cc",
+    "web_resource_util_unittest.cc",
   ]
-
   deps = [
-    ":client_update_protocol",
+    ":web_resource",
     "//base",
-    "//crypto",
+    "//ios/web",
     "//testing/gtest",
   ]
 }