Don't compile code for desktop zoom or GuestViews on mobile platforms.

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1500 matching lines @@
     "//components/domain_reliability",
     "//components/doodle",
     "//components/download",
     "//components/error_page/common",
     "//components/favicon/content",
     "//components/favicon/core",
     "//components/favicon_base",
     "//components/flags_ui",
     "//components/gcm_driver",
     "//components/google/core/browser",
-    "//components/guest_view/browser",
     "//components/handoff",
     "//components/history/content/browser",
     "//components/history/core/browser",
     "//components/history/core/common",
     "//components/infobars/core",
     "//components/invalidation/impl",
     "//components/keyed_service/content",
     "//components/metrics:call_stacks",
     "//components/metrics:gpu",
     "//components/metrics:net",
@@ skipping 79 matching lines @@
     "//components/variations",
     "//components/variations/field_trial_config",
     "//components/variations/net",
     "//components/variations/service",
     "//components/visitedlink/browser",
     "//components/visitedlink/common",
     "//components/web_cache/browser",
     "//components/web_resource",
     "//components/webdata/common",
     "//components/webdata_services",
-    "//components/zoom",
     "//content/app/resources",
     "//content/public/browser",
     "//content/public/common",
     "//content/public/common:feature_h264_with_openh264_ffmpeg",
     "//content/public/common:features",
     "//content/public/common:service_names",
     "//courgette:courgette_lib",
     "//crypto",
     "//crypto:platform",
     "//device/base",
@@ skipping 73 matching lines @@
   # platforms use OOP Mojo resolution.
   if (is_android) {
     deps += [
       "//net:net_with_v8",
       "//v8",
     ]
   } else {
     deps += [
       "//chrome/app/vector_icons",
       "//chrome/browser/resources:component_extension_resources",
+      "//components/zoom",
       "//net:net",
       "//ui/vector_icons",
     ]
     sources += [
       "sync/sessions/browser_list_router_helper.cc",
       "sync/sessions/browser_list_router_helper.h",
     ]
   }
 
   if (is_chromeos && use_cras) {
@@ skipping 259 matching lines @@
     allow_circular_includes_from += [
       "//chrome/browser/apps",
       "//chrome/browser/extensions",
     ]
     deps += [
       "//chrome/browser/sync_file_system/drive_backend:sync_file_system_drive_proto",
       "//chrome/common/extensions/api",
       "//chrome/common/extensions/api:api_registration",
       "//chrome/common/extensions/api:extensions_features",
       "//components/drive",
+      "//components/guest_view/browser",
       "//extensions/components/javascript_dialog_extensions_client",
       "//media/cast:net",
     ]
   }
   if (enable_background) {
     sources += [
       "background/background_application_list_model.cc",
       "background/background_application_list_model.h",
       "background/background_contents_service.cc",
       "background/background_contents_service.h",
@@ skipping 2759 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }