Get a minimal all.gyp working for iOS

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 427 matching lines @@
 
         ['OS=="win" or OS=="mac" or (OS=="linux" and use_aura==0)', {
           'enable_one_click_signin%': 1,
         }],
 
         ['OS=="android"', {
           'proprietary_codecs%': 1,
           'enable_webrtc%': 0,
         }],
 
+        ['OS=="ios"', {
+          'enable_automation%': 0,
+          'remoting%': 0,
+        }],
+
         # Use GPU accelerated cross process image transport by default
         # on linux builds with the Aura window manager
         ['use_aura==1 and OS=="linux"', {
           'ui_compositor_image_transport%': 1,
         }, {
           'ui_compositor_image_transport%': 0,
         }],
 
         # Turn precompiled headers on by default for VS 2010.
         ['OS=="win" and MSVS_VERSION=="2010" and buildtype!="Official"', {
@@ skipping 370 matching lines @@
           ['branding=="Chrome"', {
             'linux_breakpad%': 1,
           }],
           # All Chrome builds have breakpad symbols, but only process the
           # symbols from official builds.
           ['(branding=="Chrome" and buildtype=="Official")', {
             'linux_dump_symbols%': 1,
           }],
         ],
       }],  # os_posix==1 and OS!="mac" and OS!="ios"
+      ['OS=="ios"', {
+        'disable_nacl%': 1,
+      }],
       ['OS=="android"', {
         # Location of Android NDK.
         'variables': {
           'variables': {
             'android_ndk_root%': '<!(/bin/echo -n $ANDROID_NDK_ROOT)',
             # Android uses x86 instead of ia32 for their target_arch
             # designation.
             # TODO(wistoch): Adjust the target_arch naming scheme to avoid
             # confusion.
             # http://crbug.com/125329
@@ skipping 2388 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }