Start to unwind references to iOS in //content

content/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/features.gni")
 import("//build/config/ui.gni")
 import("//content/browser/browser.gni")
 import("//media/media_options.gni")
 
 source_set("browser") {
@@ skipping 162 matching lines @@
 
   if (!is_win && !is_mac && !is_android && (!is_linux || !use_udev)) {
     sources += [ "gamepad/gamepad_platform_data_fetcher.cc" ]
   }
 
   if (enable_basic_printing || enable_print_preview) {
     deps += [ "//printing" ]
   }
 
   # TODO(GYP)
-  #   ['OS!="ios" and chrome_multiple_dll!=1', {
+  #   [chrome_multiple_dll!=1', {
   #     'dependencies': [
   #       '../third_party/WebKit/public/blink.gyp:blink',
   #     ],
   #   }],
   if (!is_mac && !is_ios) {
     deps += [ "//sandbox" ]
   }
   if (!is_android && !is_ios) {
     deps += [ "//content/browser/tracing:resources" ]
   }
@@ skipping 298 matching lines @@
       sources -= [
         "compositor/browser_compositor_overlay_candidate_validator_ozone.cc",
         "compositor/browser_compositor_overlay_candidate_validator_ozone.h",
         "compositor/software_output_device_ozone.cc",
         "compositor/software_output_device_ozone.h",
       ]
     }
     deps += [ "//ui/compositor" ]
   }
 
-  if (!is_ios) {
-    sources += [
-      "compositor/surface_utils.cc",
-      "compositor/surface_utils.h",
-    ]
-  }
-
   if (enable_web_speech) {
     deps += [ "//third_party/flac" ]
   }
 
   if (is_linux && use_dbus) {
     deps += [ "//dbus" ]
   }
 
   if (enable_browser_cdms) {
     sources += [
@@ skipping 22 matching lines @@
 
   if (enable_webvr && is_android) {
     sources += [
       "vr/android/cardboard/cardboard_vr_device.cc",
       "vr/android/cardboard/cardboard_vr_device.h",
       "vr/android/cardboard/cardboard_vr_device_provider.cc",
       "vr/android/cardboard/cardboard_vr_device_provider.h",
     ]
   }
 }