Use check_call(), not check_output()

There is user interaction when the svn credential isn't cached. (Duh)

TBR=dpranke@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/7864007

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@100462 0039d316-1c4b-4281-b951-d872f2087c98

trychange.py

@@ -401,10 +401,9 @@ def _SendChangeSVN(options):
       if scm.SVN.AssertVersion("1.5")[0]:
         command.append('--no-ignore')
 
-      subprocess2.check_output(
-          command, stdout=subprocess2.PIPE, stderr=subprocess2.STDOUT)
+      subprocess2.check_call(command)
     except subprocess2.CalledProcessError, e:
-      raise NoTryServerAccess(' '.join(e.cmd) + '\nOuput:\n' + e.stdout)
+      raise NoTryServerAccess(str(e))
   finally:
     temp_file.close()
     shutil.rmtree(temp_dir, True)