Remove unused fields found by clang's new Wunused-private-fields.

webkit/quota/quota_temporary_storage_evictor_unittest.cc

Index: webkit/quota/quota_temporary_storage_evictor_unittest.cc
diff --git a/webkit/quota/quota_temporary_storage_evictor_unittest.cc b/webkit/quota/quota_temporary_storage_evictor_unittest.cc
index 1d6bf92e33037ec15bc95943f18510e464d328d8..756c6278e26d4fa434f63425da8c90fe120143d3 100644
--- a/webkit/quota/quota_temporary_storage_evictor_unittest.cc
+++ b/webkit/quota/quota_temporary_storage_evictor_unittest.cc
@@ -30,8 +30,7 @@ class MockQuotaEvictionHandler : public quota::QuotaEvictionHandler {
         unlimited_usage_(0),
         available_space_(0),
         error_on_evict_origin_data_(false),
-        error_on_get_usage_and_quota_(false),
-        test_(test) {}
+        error_on_get_usage_and_quota_(false) {}
 
   virtual void EvictOriginData(
       const GURL& origin,
@@ -135,7 +134,6 @@ class MockQuotaEvictionHandler : public quota::QuotaEvictionHandler {
   bool error_on_evict_origin_data_;
   bool error_on_get_usage_and_quota_;
 
-  QuotaTemporaryStorageEvictorTest *test_;
   base::Closure task_for_get_usage_and_quota_;
 };