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

chrome/test/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/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 99 matching lines @@
     "//chrome/common:test_support",
     "//chrome/renderer",
     "//chrome/renderer:test_support",
     "//chrome/utility",
     "//components/autofill/core/browser:test_support",
     "//components/bookmarks/test",
     "//components/captive_portal:test_support",
     "//components/gcm_driver:test_support",
     "//components/gcm_driver/crypto:test_support",
     "//components/gcm_driver/instance_id:test_support",
-    "//components/guest_view/browser:test_support",
     "//components/history/core/test:test",
     "//components/infobars/core",
     "//components/metrics:test_support",
     "//components/network_time:network_time_test_support",
     "//components/omnibox/browser:test_support",
     "//components/password_manager/core/browser:test_support",
     "//components/prefs:test_support",
     "//components/rappor:test_support",
     "//components/search_engines:test_support",
     "//components/sessions:test_support",
     "//components/signin/core/browser:test_support",
     "//components/subresource_filter/content/browser:test_support",
     "//components/subresource_filter/core/common",
     "//components/sync",
     "//components/sync:test_support_driver",
     "//components/sync_preferences:test_support",
     "//components/sync_sessions:test_support",
     "//components/toolbar:test_support",
     "//components/update_client:test_support",
     "//components/web_resource:test_support",
-    "//components/zoom:test_support",
     "//content/public/app:both",
     "//content/public/child",
     "//content/public/common",
     "//content/public/renderer",
     "//content/public/utility",
     "//content/test:test_support",
     "//extensions/features",
     "//google_apis:test_support",
     "//gpu/ipc/service",
     "//ipc:test_support",
@@ skipping 23 matching lines @@
   }
 
   if (is_android) {
     public_deps -= [ "//ui/message_center:test_support" ]
     sources -= [
       "base/dialog_test_browser_window.cc",
       "base/dialog_test_browser_window.h",
       "base/test_browser_window.cc",
       "base/test_browser_window.h",
     ]
+  } else {
+    public_deps += [ "//components/zoom:test_support" ]
   }
 
   if (enable_extensions) {
     public_deps += [
       "//apps:test_support",
       "//chrome/common/extensions/api",
+      "//components/guest_view/browser:test_support",
       "//extensions:test_support",
     ]
   }
 
   if (enable_offline_pages) {
     public_deps += [ "//components/offline_pages/core:test_support" ]
   }
 
   if (is_linux) {
     public_deps += [ "//crypto:platform" ]
@@ skipping 4922 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }