ozone: Support building without cairo

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 510 matching lines @@
           'use_x11%': 1,
         }],
 
         # Flags to use glib.
         ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android"', {
           'use_glib%': 0,
         }, {
           'use_glib%': 1,
         }],
 
-        # Flags to use pango.
+        # Flags to use pango and cairo.
         ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or embedded==1', {
           'use_pango%': 0,
+          'use_cairo%': 0,
         }, {
           'use_pango%': 1,
+          'use_cairo%': 1,
         }],
 
         # DBus usage.
         ['OS=="linux" and embedded==0', {
           'use_dbus%': 1,
         }, {
           'use_dbus%': 0,
         }],
 
         # We always use skia text rendering in Aura on Windows, since GDI
@@ skipping 308 matching lines @@
     'use_aura%': '<(use_aura)',
     'use_ash%': '<(use_ash)',
     'use_cras%': '<(use_cras)',
     'use_openssl%': '<(use_openssl)',
     'use_nss%': '<(use_nss)',
     'os_bsd%': '<(os_bsd)',
     'os_posix%': '<(os_posix)',
     'use_dbus%': '<(use_dbus)',
     'use_glib%': '<(use_glib)',
     'use_pango%': '<(use_pango)',
+    'use_cairo%': '<(use_cairo)',
     'use_ozone%': '<(use_ozone)',
     'use_ozone_evdev%': '<(use_ozone_evdev)',
     'toolkit_uses_gtk%': '<(toolkit_uses_gtk)',
     'desktop_linux%': '<(desktop_linux)',
     'use_x11%': '<(use_x11)',
     'use_gnome_keyring%': '<(use_gnome_keyring)',
     'linux_fpic%': '<(linux_fpic)',
     'chromeos%': '<(chromeos)',
     'enable_viewport%': '<(enable_viewport)',
     'enable_hidpi%': '<(enable_hidpi)',
@@ skipping 1188 matching lines @@
       }],
       ['ui_compositor_image_transport==1', {
         'defines': ['UI_COMPOSITOR_IMAGE_TRANSPORT'],
       }],
       ['use_aura==1', {
         'defines': ['USE_AURA=1'],
       }],
       ['use_ash==1', {
         'defines': ['USE_ASH=1'],
       }],
+      ['use_cairo==1', {
+        'defines': ['USE_CAIRO=1'],
+      }],
       ['use_cras==1', {
         'defines': ['USE_CRAS=1'],
       }],
       ['use_ozone==1', {
         'defines': ['USE_OZONE=1'],
       }],
       ['use_default_render_theme==1', {
         'defines': ['USE_DEFAULT_RENDER_THEME=1'],
       }],
       ['use_libjpeg_turbo==1', {
@@ skipping 2705 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',
   },
 }