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

chrome/renderer/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/features.gni")
 import("//chrome/common/features.gni")
 import("//components/spellcheck/spellcheck_build_features.gni")
 import("//extensions/features/features.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
@@ skipping 99 matching lines @@
     "//chrome/common",
     "//chrome/common:instant_mojom",
     "//chrome/common:mojo_bindings",
     "//chrome/common/net",
     "//components/autofill/content/renderer",
     "//components/cdm/renderer",
     "//components/contextual_search:renderer",
     "//components/data_reduction_proxy/core/common",
     "//components/dom_distiller/content/renderer",
     "//components/error_page/renderer",
-    "//components/guest_view/renderer",
     "//components/network_hints/renderer",
     "//components/omnibox/common",
     "//components/password_manager/content/renderer",
     "//components/plugins/renderer",
     "//components/rappor/public/interfaces",
     "//components/resources:components_resources",
     "//components/spellcheck:build_features",
     "//components/startup_metric_utils/common:interfaces",
     "//components/subresource_filter/content/renderer",
     "//components/task_scheduler_util/renderer",
@@ skipping 176 matching lines @@
       "resources/extensions/page_action_custom_bindings.js",
       "resources/extensions/page_capture_custom_bindings.js",
       "resources/extensions/system_indicator_custom_bindings.js",
       "resources/extensions/tts_custom_bindings.js",
       "resources/extensions/tts_engine_custom_bindings.js",
     ]
     deps += [
       # TODO(hclam): See crbug.com/298380 for details.
       # We should isolate the APIs needed by the renderer.
       "//chrome/common/extensions/api",
+      "//components/guest_view/renderer",
       "//extensions:extensions_resources",
       "//extensions/renderer",
       "//media/cast:net",
       "//media/cast:receiver",
       "//media/cast:sender",
     ]
     public_deps = [
       "//ipc",
     ]
     if (!enable_webrtc) {
@@ skipping 94 matching lines @@
     ]
   }
 
   if (is_android) {
     sources -= [
       "safe_browsing/mock_feature_extractor_clock.cc",
       "safe_browsing/mock_feature_extractor_clock.h",
     ]
   }
 }