Remove dependency of NaCl untarred toolchain from NaCl SDK Tests.

native_client_sdk/src/tools/tests/create_nmf_test.py

Index: native_client_sdk/src/tools/tests/create_nmf_test.py
diff --git a/native_client_sdk/src/tools/tests/create_nmf_test.py b/native_client_sdk/src/tools/tests/create_nmf_test.py
index da09dd20d076b32579df4e325038a1049e25bf38..9c97a25f1ccd82bd5fb6e1f3e55f28112536d81b 100755
--- a/native_client_sdk/src/tools/tests/create_nmf_test.py
+++ b/native_client_sdk/src/tools/tests/create_nmf_test.py
@@ -21,10 +21,13 @@ MOCK_DIR = os.path.join(CHROME_SRC, "third_party", "pymock")
 sys.path.append(MOCK_DIR)
 sys.path.append(TOOLS_DIR)
 
+import build_paths
 import create_nmf
-import getos
 import mock
 
+TOOLCHAIN_OUT = os.path.join(build_paths.OUT_DIR, 'sdk_tests', 'toolchain')
+NACL_X86_GLIBC_TOOLCHAIN = os.path.join(TOOLCHAIN_OUT, 'nacl_x86_glibc')
+
 
 PosixRelPath = create_nmf.PosixRelPath
 
@@ -83,9 +86,7 @@ class TestNmfUtils(unittest.TestCase):
 
   def setUp(self):
     self.tempdir = None
-    toolchain = os.path.join(CHROME_SRC, 'native_client', 'toolchain')
-    self.toolchain = os.path.join(toolchain, '%s_x86' % getos.GetPlatform(),
-                                  'nacl_x86_glibc')
+    self.toolchain = NACL_X86_GLIBC_TOOLCHAIN
     self.objdump = os.path.join(self.toolchain, 'bin', 'i686-nacl-objdump')
     if os.name == 'nt':
       self.objdump += '.exe'