Upstream ChromeOS patch on O3D. (Change Icf3bc91d: http://gerrit.chromium.org/gerrit/#change,2220)

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 88158)
+++ build/common.gypi	(working copy)
@@ -80,6 +80,22 @@
 
     # Whether to enable the English-only, Win/Mac-only fullscreen message.
     'plugin_enable_fullscreen_msg%': '1',
+
+    'conditions': [
+      ['OS == "linux" or OS == "freebsd" or OS == "openbsd"', {
+        'conditions': [
+          ['sysroot!=""', {
+            'variables': {
+              'pkg-config%': '<(DEPTH)/o3d/build/linux/pkg-config-wrapper "<(sysroot)"',
+            },
+          }, {
+            'variables': {
+              'pkg-config%': 'pkg-config'
+            },
+          }],
+        ],
+      }],
+    ],
   },
   'target_defaults': {
     'defines': [