Let prefetched resources skip cache revalidation once for a short duration.

net/http/http_transaction_test_util.cc

Index: net/http/http_transaction_test_util.cc
diff --git a/net/http/http_transaction_test_util.cc b/net/http/http_transaction_test_util.cc
index dbbca6c3d9e9bff6c2c8cc8f808154bfe2df88c2..4aa6fef7100bdf74110288c96b58934497aba10f 100644
--- a/net/http/http_transaction_test_util.cc
+++ b/net/http/http_transaction_test_util.cc
@@ -9,6 +9,8 @@
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
+#include "base/time/clock.h"
+#include "base/time/default_clock.h"
 #include "base/time/time.h"
 #include "net/base/load_flags.h"
 #include "net/base/load_timing_info.h"
@@ -399,14 +401,14 @@ int MockNetworkTransaction::StartInternal(
       "%s\n%s\n", resp_status.c_str(), resp_headers.c_str());
   std::replace(header_data.begin(), header_data.end(), '\n', '\0');
 
-  response_.request_time = base::Time::Now();
+  response_.request_time = transaction_factory_->clock()->Now();
   if (!t->request_time.is_null())
     response_.request_time = t->request_time;
 
   response_.was_cached = false;
   response_.network_accessed = true;
 
-  response_.response_time = base::Time::Now();
+  response_.response_time = transaction_factory_->clock()->Now();
   if (!t->response_time.is_null())
     response_.response_time = t->response_time;
 
@@ -418,6 +420,9 @@ int MockNetworkTransaction::StartInternal(
   if (net_log.net_log())
     socket_log_id_ = net_log.net_log()->NextID();
 
+  if (request_->load_flags & net::LOAD_PREFETCH)
+    response_.unused_since_prefetch = true;
+
   if (test_mode_ & TEST_MODE_SYNC_NET_START)
     return net::OK;
 
@@ -454,7 +459,10 @@ MockNetworkLayer::MockNetworkLayer()
     : transaction_count_(0),
       done_reading_called_(false),
       stop_caching_called_(false),
-      last_create_transaction_priority_(net::DEFAULT_PRIORITY) {}
+      last_create_transaction_priority_(net::DEFAULT_PRIORITY),
+      default_clock_(new base::DefaultClock()),
+      clock_(default_clock_.get()) {
+}
 
 MockNetworkLayer::~MockNetworkLayer() {}
 
@@ -486,6 +494,12 @@ net::HttpNetworkSession* MockNetworkLayer::GetSession() {
   return NULL;
 }
 
+void MockNetworkLayer::SetClock(base::Clock* clock) {
+  DCHECK(default_clock_);
+  clock_ = clock;
+  default_clock_.reset();

[rvargas (doing something else), 2014/12/24 02:15:25]

sounds like we need only one variable to store the clock.

[jkarlin, 2015/01/08 16:13:04]

Done.

+}
+
 //-----------------------------------------------------------------------------
 // helpers