Avoid double-InitCache() in SimpleDoomBetween test, leak

Quick fix.

Review URL: https://chromiumcodereview.appspot.com/14188044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195222 0039d316-1c4b-4281-b951-d872f2087c98

net/disk_cache/backend_unittest.cc

@@ -2901,13 +2901,11 @@ TEST_F(DiskCacheBackendTest, SimpleOpenBadFile) {
 
 TEST_F(DiskCacheBackendTest, SimpleDoomRecent) {
   SetSimpleCacheMode();
-  InitCache();
   BackendDoomRecent();
 }
 
 TEST_F(DiskCacheBackendTest, SimpleDoomBetween) {
   SetSimpleCacheMode();
-  InitCache();
   BackendDoomBetween();
 }