Http cache: Fix DCHECK with POSTs and a disabled cache.

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 0b0505770d564891745e5889b2e932e9dea602e9..dec2ca93f4081368d3e581f2f48a51ce9ae4ac39 100644
--- a/net/http/http_cache_unittest.cc
+++ b/net/http/http_cache_unittest.cc
@@ -2740,6 +2740,18 @@ TEST(HttpCache, SimplePOST_SkipsCache) {
   EXPECT_EQ(0, cache.disk_cache()->create_count());
 }
 
+// Tests POST handling with a disabled cache (no DCHECK).
+TEST(HttpCache, SimplePOST_DisabledCache) {
+  MockHttpCache cache;
+  cache.http_cache()->set_mode(net::HttpCache::Mode::DISABLE);
+
+  RunTransactionTest(cache.http_cache(), kSimplePOST_Transaction);
+
+  EXPECT_EQ(1, cache.network_layer()->transaction_count());
+  EXPECT_EQ(0, cache.disk_cache()->open_count());
+  EXPECT_EQ(0, cache.disk_cache()->create_count());
+}
+
 TEST(HttpCache, SimplePOST_LoadOnlyFromCache_Miss) {
   MockHttpCache cache;