SDCH: add TimeWeightedMemoryUse

net/sdch/sdch_owner_unittest.cc

Index: net/sdch/sdch_owner_unittest.cc
diff --git a/net/sdch/sdch_owner_unittest.cc b/net/sdch/sdch_owner_unittest.cc
index ebcbd02b3d358dddfa4206ea4655ada12c69c7d4..1dcbc756f2219d5bfe24f3a7df2425d2f688c1d4 100644
--- a/net/sdch/sdch_owner_unittest.cc
+++ b/net/sdch/sdch_owner_unittest.cc
@@ -6,6 +6,7 @@
 #include "base/prefs/testing_pref_store.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
+#include "base/test/histogram_tester.h"
 #include "base/test/simple_test_clock.h"
 #include "base/values.h"
 #include "net/base/net_log.h"
@@ -417,11 +418,15 @@ TEST_F(SdchOwnerTest, ConfirmAutoEviction) {
   EXPECT_TRUE(DictionaryPresentInManager(server_hash_d1));
   EXPECT_TRUE(DictionaryPresentInManager(server_hash_d2));
 
+  base::HistogramTester tester;
+
   EXPECT_TRUE(
       CreateAndAddDictionary(kMaxSizeForTesting / 2, &server_hash_d3, fresh));
   EXPECT_TRUE(DictionaryPresentInManager(server_hash_d1));
   EXPECT_FALSE(DictionaryPresentInManager(server_hash_d2));
   EXPECT_TRUE(DictionaryPresentInManager(server_hash_d3));
+
+  tester.ExpectTotalCount("Sdch3.TimeWeightedMemoryUse", 1);
 }
 
 // Confirm auto-eviction happens if space is needed, with a more complicated