MD History: Enable by default

chrome/browser/ui/webui/log_web_ui_url_browsertest.cc

 // Copyright 2015 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 "chrome/browser/ui/webui/log_web_ui_url.h"
 
 #include <stdint.h>
 
 #include <vector>
 
+#include "base/feature_list.h"
 #include "base/hash.h"
 #include "base/macros.h"
 #include "base/test/histogram_tester.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/test/browser_test_utils.h"
 #include "grit/components_strings.h"
 #include "grit/generated_resources.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "url/gurl.h"
 
 using base::Bucket;
 using testing::ElementsAre;
 
 namespace webui {
 
 class LogWebUIUrlTest : public InProcessBrowserTest {
  public:
   LogWebUIUrlTest() {}
   ~LogWebUIUrlTest() override {}
 
   std::vector<Bucket> GetSamples() {
     return histogram_tester_.GetAllSamples(webui::kWebUICreatedForUrl);
   }
 
+  void SetUpOnMainThread() override {
+    // Disable MD History to test non-MD history page.
+    std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList);
+    feature_list->InitializeFromCommandLine(
+        std::string(), features::kMaterialDesignHistoryFeature.name);
+    base::FeatureList::ClearInstanceForTesting();
+    base::FeatureList::SetInstance(std::move(feature_list));
+  }
+
  private:
   base::HistogramTester histogram_tester_;
 
   DISALLOW_COPY_AND_ASSIGN(LogWebUIUrlTest);
 };
 
 IN_PROC_BROWSER_TEST_F(LogWebUIUrlTest, TestHistoryFrame) {
   GURL history_frame_url(chrome::kChromeUIHistoryFrameURL);
 
   ui_test_utils::NavigateToURL(browser(), history_frame_url);
@@ skipping 58 matching lines @@
   uint32_t extensions_frame_url_hash = base::Hash(extensions_frame_url.spec());
 
   EXPECT_THAT(GetSamples(), ElementsAre(Bucket(extensions_frame_url_hash, 1),
                                         Bucket(history_frame_url_hash, 2),
                                         Bucket(uber_frame_url_hash, 2),
                                         Bucket(uber_url_hash, 2)));
 }
 #endif
 
 }  // namespace webui