Add a field study to use new reload behavior even on desktops

content/browser/loader/reload_cache_control_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/feature_list.h"
 #include "base/files/file_path.h"
+#include "content/public/common/content_features.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/embedded_test_server/http_request.h"
 #include "net/test/embedded_test_server/http_response.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace content {
@@ skipping 41 matching lines @@
     auto cache_control = request.headers.find("Cache-Control");
     log.cache_control = cache_control == request.headers.end()
                             ? kNoCacheControl
                             : cache_control->second;
     request_log_.push_back(log);
   }
 
   DISALLOW_COPY_AND_ASSIGN(ReloadCacheControlBrowserTest);
 };
 
+class ReloadCacheControlWithAnExperimentBrowserTest
+    : public ReloadCacheControlBrowserTest {
+ protected:
+  ReloadCacheControlWithAnExperimentBrowserTest() = default;
+  ~ReloadCacheControlWithAnExperimentBrowserTest() override = default;
+
+  void SetUpOnMainThread() override {
+    base::FeatureList::ClearInstanceForTesting();
+    std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList);
+    feature_list->InitializeFromCommandLine(
+        features::kNonValidatingReloadOnNormalReload.name, std::string());
+    base::FeatureList::SetInstance(std::move(feature_list));
+
+    ReloadCacheControlBrowserTest::SetUpOnMainThread();
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(ReloadCacheControlWithAnExperimentBrowserTest);
+};
+
 IN_PROC_BROWSER_TEST_F(ReloadCacheControlBrowserTest, NormalReload) {
   GURL url(embedded_test_server()->GetURL(kReloadTestPath));
 
   EXPECT_TRUE(NavigateToURL(shell(), url));
   ReloadBlockUntilNavigationsComplete(shell(), 1);
 
   ASSERT_EQ(4UL, request_log_.size());
   EXPECT_EQ(kReloadTestPath, request_log_[0].relative_url);
   EXPECT_EQ(kNoCacheControl, request_log_[0].cache_control);
   EXPECT_EQ(kReloadImagePath, request_log_[1].relative_url);
@@ skipping 16 matching lines @@
   EXPECT_EQ(kNoCacheControl, request_log_[0].cache_control);
   EXPECT_EQ(kReloadImagePath, request_log_[1].relative_url);
   EXPECT_EQ(kNoCacheControl, request_log_[1].cache_control);
 
   EXPECT_EQ(kReloadTestPath, request_log_[2].relative_url);
   EXPECT_EQ(kNoCacheCacheControl, request_log_[2].cache_control);
   EXPECT_EQ(kReloadImagePath, request_log_[3].relative_url);
   EXPECT_EQ(kNoCacheCacheControl, request_log_[3].cache_control);
 }
 
+IN_PROC_BROWSER_TEST_F(ReloadCacheControlWithAnExperimentBrowserTest,
+                       ReloadMainResource) {
+  GURL url(embedded_test_server()->GetURL(kReloadTestPath));
+
+  EXPECT_TRUE(NavigateToURL(shell(), url));
+  ReloadBlockUntilNavigationsComplete(shell(), 1);
+
+  ASSERT_EQ(4UL, request_log_.size());
+  EXPECT_EQ(kReloadTestPath, request_log_[0].relative_url);
+  EXPECT_EQ(kNoCacheControl, request_log_[0].cache_control);
+  EXPECT_EQ(kReloadImagePath, request_log_[1].relative_url);
+  EXPECT_EQ(kNoCacheControl, request_log_[1].cache_control);
+
+  EXPECT_EQ(kReloadTestPath, request_log_[2].relative_url);
+  EXPECT_EQ(kMaxAgeCacheControl, request_log_[2].cache_control);
+  EXPECT_EQ(kReloadImagePath, request_log_[3].relative_url);
+  EXPECT_EQ(kNoCacheControl, request_log_[3].cache_control);
+}
+
+// TODO(toyoshim): Add another set of reload tests with DevTools open.
+
 }  // namespace
 
 }  // namespace content