[ios] Removed unused CRWWebControllerObserver methods.

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 502 matching lines @@
     "net/crw_cert_verification_controller_unittest.mm",
     "net/crw_ssl_status_updater_unittest.mm",
     "net/request_group_util_unittest.mm",
     "net/request_tracker_impl_unittest.mm",
     "net/web_http_protocol_handler_delegate_unittest.mm",
     "payments/payment_request_unittest.cc",
     "public/origin_util_unittest.mm",
     "public/referrer_util_unittest.cc",
     "public/web_state/page_viewport_state_unittest.mm",
     "string_util_unittest.cc",
-    "test/crw_fake_web_controller_observer_unittest.mm",
     "url_scheme_util_unittest.mm",
     "url_util_unittest.cc",
     "web_state/crw_pass_kit_downloader_unittest.mm",
     "web_state/crw_web_view_scroll_view_proxy_unittest.mm",
     "web_state/error_translation_util_unittest.mm",
     "web_state/js/common_js_unittest.mm",
     "web_state/js/core_js_unittest.mm",
     "web_state/js/credential_util_unittest.mm",
     "web_state/js/crw_js_injection_manager_unittest.mm",
     "web_state/js/crw_js_post_request_loader_unittest.mm",
@@ skipping 89 matching lines @@
 }
 
 grit("resources") {
   source = "ios_web_resources.grd"
   use_qualified_include = true
   outputs = [
     "grit/ios_web_resources.h",
     "ios_web_resources.pak",
   ]
 }