Use the system provided harfbuzz on chromeos

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index dbfd8243fe7f52f8174d6529da5ac955e2ed5d16..3f9c4335410fb88fcadf7326da95a3fc844eb524 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -297,6 +297,9 @@
       # use_libjpeg_turbo is set.
       'use_system_libjpeg%': 0,
 
+      # Use system libharfbuzz-ng.
+      'use_system_harfbuzz%': 0,
+
       # By default, component is set to static_library and it can be overriden
       # by the GYP command line or by ~/.gyp/include.gypi.
       'component%': 'static_library',
@@ -737,6 +740,9 @@
         ['chromeos==1', {
           # When building for ChromeOS we dont want Chromium to use libjpeg_turbo.
           'use_libjpeg_turbo%': 0,
+
+          # On ChromeOS, we use the system libharfbuzz-ng.

[Nico, 2014/03/18 15:12:13]

Probably better to answer "why?" than "what?" here

[jochen (gone - plz use gerrit), 2014/03/18 15:39:37]

Done.

+          'use_system_harfbuzz%': 1,
         }],
 
         ['OS=="android"', {
@@ -981,6 +987,7 @@
     'wix_path%': '<(wix_path)',
     'use_libjpeg_turbo%': '<(use_libjpeg_turbo)',
     'use_system_libjpeg%': '<(use_system_libjpeg)',
+    'use_system_harfbuzz%': '<(use_system_harfbuzz)',
     'android_webview_build%': '<(android_webview_build)',
     'icu_use_data_file_flag%': '<(icu_use_data_file_flag)',
     'gyp_managed_install%': 0,
@@ -2979,8 +2986,7 @@
     },
   },
   'conditions': [
-    # TODO(jochen): Enable this on chromeos. http://crbug.com/353127 
-    ['os_posix==1 and chromeos==0', {

[Nico, 2014/03/18 15:12:13]

Mention that you're also turning on linker-warnings-as-errors in the cl
description.

[jochen (gone - plz use gerrit), 2014/03/18 15:39:37]

Done.

+    ['os_posix==1', {
       'target_defaults': {
         'ldflags': [
           '-Wl,--fatal-warnings',