Access environment variables through Host object instead of directly.

third_party/WebKit/Tools/Scripts/webkitpy/common/host.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/host.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/host.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/host.py
index 1003eeb64ba2aae02b6d65f2ecbb63f12f75d035..904ef08364cb124399a663e85ca499e5d9e9655b 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/host.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/host.py
@@ -28,7 +28,6 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import logging
-import os
 import sys
 
 from webkitpy.common.checkout.scm.detection import SCMDetector
@@ -73,10 +72,10 @@ class Host(SystemHost):
         # messages and svn.py will fail to parse them.
         # FIXME: We should do these overrides *only* for the subprocesses we know need them!
         # This hack only works in unix environments.
-        os.environ['LANGUAGE'] = 'en'
-        os.environ['LANG'] = 'en_US.UTF-8'
-        os.environ['LC_MESSAGES'] = 'en_US.UTF-8'
-        os.environ['LC_ALL'] = ''
+        self.set_env('LANGUAGE', 'en')
+        self.set_env('LANG', 'en_US.UTF-8')
+        self.set_env('LC_MESSAGES', 'en_US.UTF-8')
+        self.set_env('LC_ALL', '')
 
     # FIXME: This is a horrible, horrible hack for WinPort and should be removed.
     # Maybe this belongs in Git in some more generic "find the git binary" codepath?