RFC: use some in-memory state in SimpleCache to quickly cache-miss some CantConditionalize cases

net/http/http_cache_unittest.cc

Index: net/http/http_cache_unittest.cc
diff --git a/net/http/http_cache_unittest.cc b/net/http/http_cache_unittest.cc
index 62269b7952c8b89bc3d66dc773b42c22f62311fb..53cca65ca05c75d0b34c45faa89421678075791f 100644
--- a/net/http/http_cache_unittest.cc
+++ b/net/http/http_cache_unittest.cc
@@ -1328,8 +1328,8 @@ TEST(HttpCache, SimpleGET_PreserveRequestHeaders) {
   RunTransactionTest(cache.http_cache(), transaction);
 
   EXPECT_EQ(2, cache.network_layer()->transaction_count());
-  EXPECT_EQ(1, cache.disk_cache()->open_count());
-  EXPECT_EQ(1, cache.disk_cache()->create_count());
+  EXPECT_EQ(0, cache.disk_cache()->open_count());
+  EXPECT_EQ(2, cache.disk_cache()->create_count());
   RemoveMockTransaction(&transaction);
 }
 
@@ -4950,8 +4950,8 @@ TEST(HttpCache, GET_NoConditionalization) {
   // The last response was saved.
   RunTransactionTest(cache.http_cache(), transaction);
   EXPECT_EQ(3, cache.network_layer()->transaction_count());
-  EXPECT_EQ(2, cache.disk_cache()->open_count());
-  EXPECT_EQ(2, cache.disk_cache()->create_count());
+  EXPECT_EQ(1, cache.disk_cache()->open_count());
+  EXPECT_EQ(3, cache.disk_cache()->create_count());
 }
 
 // Verifies that conditionalization failures when asking for a range that would
@@ -7384,8 +7384,8 @@ TEST(HttpCache, CacheControlNoCacheNormalLoad) {
   RunTransactionTest(cache.http_cache(), transaction);
 
   EXPECT_EQ(2, cache.network_layer()->transaction_count());
-  EXPECT_EQ(1, cache.disk_cache()->open_count());
-  EXPECT_EQ(1, cache.disk_cache()->create_count());
+  EXPECT_EQ(0, cache.disk_cache()->open_count());
+  EXPECT_EQ(2, cache.disk_cache()->create_count());
 
   disk_cache::Entry* entry;
   EXPECT_TRUE(cache.OpenBackendEntry(transaction.url, &entry));