Added test for CHROME_ORIGIN presence, should fix the build.

client/deps/chrome_test/chrome_test.py

Index: client/deps/chrome_test/chrome_test.py
diff --git a/client/deps/chrome_test/chrome_test.py b/client/deps/chrome_test/chrome_test.py
index a876836bd39ba220acb9ad778d64ebb807844d05..a84662215fd5ea9cc086fdfcca0f1de9f9d07b28 100755
--- a/client/deps/chrome_test/chrome_test.py
+++ b/client/deps/chrome_test/chrome_test.py
@@ -10,10 +10,11 @@ from autotest_lib.client.bin import utils
 version = 1
 
 def setup(top_dir):
-    if os.environ['CHROME_ORIGIN'] != 'LOCAL_SOURCE':
+    if 'CHROME_ORIGIN' not in os.environ.keys() or \
+       os.environ['CHROME_ORIGIN'] != 'LOCAL_SOURCE':
         logging.info('Skipping Chrome test resource setup for non-local builds')
         return
-      
+
     chrome_test_files = os.environ['SYSROOT'] + '/usr/local/autotest-chrome'
     logging.info('Configuring chrome test resources in %s' % top_dir)
     testsrc_dir = top_dir + '/test_src'