ozone: Support building without cairo

skia/skia_library.gypi

 # Copyright 2013 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.
 
 
 # This gypi file contains the Skia library.
 # In component mode (shared_lib) it is folded into a single shared library with
 # the Chrome-specific enhancements but in all other cases it is a separate lib.
 {
   'dependencies': [
@@ skipping 255 matching lines @@
     }],
     [ 'target_arch == "arm" or target_arch == "mipsel"', {
       'sources!': [
         '../third_party/skia/src/opts/opts_check_SSE2.cpp'
       ],
     }],
     [ 'desktop_linux == 1 or chromeos == 1', {
       'dependencies': [
         '../build/linux/system.gyp:fontconfig',
         '../build/linux/system.gyp:freetype2',
-        '../build/linux/system.gyp:pangocairo',
         '../third_party/icu/icu.gyp:icuuc',
       ],
       'cflags': [
         '-Wno-unused',
         '-Wno-unused-function',
       ],
     }],
+    [ 'use_cairo == 1', {
+      'dependencies': [
+        '../build/linux/system.gyp:pangocairo',
+      ],
+    }],
     [ 'OS=="win" or OS=="mac" or OS=="ios" or OS=="android"', {
       'sources!': [
         '../third_party/skia/src/ports/SkFontConfigInterface_direct.cpp',
         '../third_party/skia/src/fonts/SkFontMgr_fontconfig.cpp',
       ],
     }],
     [ 'OS=="win" or OS=="mac" or OS=="ios"', {
       'sources!': [
         '../third_party/skia/src/ports/SkFontHost_FreeType.cpp',
         '../third_party/skia/src/ports/SkFontHost_FreeType_common.cpp',
@@ skipping 164 matching lines @@
       '../third_party/skia/include/pathops',
       '../third_party/skia/include/pipe',
       '../third_party/skia/include/ports',
       '../third_party/skia/include/utils',
     ],
     'defines': [
       '<@(skia_export_defines)',
     ],
   },
 }