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

ios/web/BUILD.gn

 # Copyright 2015 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("//ios/build/config.gni")
 import("//ios/web/js_compile.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 
 source_set("web_arc") {
@@ skipping 276 matching lines @@
     "web_state/web_state_observer_bridge.mm",
     "web_state/web_state_policy_decider.mm",
     "web_state/web_state_weak_ptr_factory.h",
     "web_state/web_state_weak_ptr_factory.mm",
     "web_state/web_view_internal_creation_util.h",
     "web_state/web_view_internal_creation_util.mm",
     "web_state/wk_web_view_security_util.h",
     "web_state/wk_web_view_security_util.mm",
   ]
 
-  libs = [ "WebKit.framework" ]
+  libs = [
+    "CoreGraphics.framework",
+    "WebKit.framework",
+  ]
 
   allow_circular_includes_from = [ ":web_arc" ]
 }
 
 source_set("core") {
   deps = [
     "//base",
     "//url",
   ]
 
@@ skipping 299 matching lines @@
 }
 
 grit("resources") {
   source = "ios_web_resources.grd"
   use_qualified_include = true
   outputs = [
     "grit/ios_web_resources.h",
     "ios_web_resources.pak",
   ]
 }