Added experiments section and exported the list of SafeBrowsing features in WebUI

components/safe_browsing/features.cc

Index: components/safe_browsing/features.cc
diff --git a/components/safe_browsing/features.cc b/components/safe_browsing/features.cc
new file mode 100644
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+++ b/components/safe_browsing/features.cc
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+// Copyright (c) 2017 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 "components/safe_browsing/features.h"
+
+#include <stddef.h>
+#include <algorithm>
+#include <utility>
+#include <vector>
+#include "base/feature_list.h"
+
+#include "base/macros.h"
+#include "base/values.h"
+namespace safe_browsing {
+// Please define any new SafeBrowsing related features in this file, and add
+// them to  the ExperimentalFeaturesList below to start displaying their status
+// on the  chrome://safe-browsing page.
+const base::Feature kLocalDatabaseManagerEnabled{
+    "SafeBrowsingV4LocalDatabaseManagerEnabled",
+    base::FEATURE_DISABLED_BY_DEFAULT};
+
+const base::Feature kV4OnlyEnabled{"SafeBrowsingV4OnlyEnabled",
+                                   base::FEATURE_DISABLED_BY_DEFAULT};
+// This Feature specifies which non-resource HTML Elements to collect based on
+// their tag and attributes. It's a single param containing a comma-separated
+// list of pairs. For example: "tag1,id,tag1,height,tag2,foo" - this will
+// collect elements with tag "tag1" that have attribute "id" or "height" set,
+// and elements of tag "tag2" if they have attribute "foo" set. All tag names
+// and attributes should be lower case.
+const base::Feature kThreatDomDetailsTagAndAttributeFeature{
+    "ThreatDomDetailsTagAttributes", base::FEATURE_DISABLED_BY_DEFAULT};
+
+namespace {
+// List of experimental features. Boolean value for each list member should be
+// set to True if the experiment is currently running at a probability other
+// than 1 or 0, or to False otherwise.
+std::vector<std::pair<const base::Feature*, bool>>
+GetExperimentalFeaturesList() {
+  std::vector<std::pair<const base::Feature*, bool>> experimental_features_list{
+      std::make_pair(&kLocalDatabaseManagerEnabled, true),
+      std::make_pair(&kV4OnlyEnabled, true),
+      std::make_pair(&kThreatDomDetailsTagAndAttributeFeature, true)};
+
+  return experimental_features_list;
+}
+
+// Adds the name and the enabled/disabled status of a given feature.
+void AddFeatureAndAvailability(const base::Feature* exp_feature,
+                               base::ListValue* param_list) {
+  param_list->GetList().push_back(base::Value(exp_feature->name));
+  if (base::FeatureList::IsEnabled(*exp_feature)) {
+    param_list->GetList().push_back(base::Value("Enabled"));
+  } else {
+    param_list->GetList().push_back(base::Value("Disabled"));
+  }
+}
+}  // namespace
+
+// Returns the list of the experimental features that are enabled or disabled,
+// as part of currently running Safe Browsing experiments.
+base::ListValue GetFeatureStatusList() {
+  std::vector<std::pair<const base::Feature*, bool>> features_list =
+      GetExperimentalFeaturesList();
+
+  base::ListValue param_list;
+  for (std::vector<std::pair<const base::Feature*, bool>>::iterator it =
+           features_list.begin();
+       it != features_list.end(); ++it) {
+    if ((*it).second) {
+      AddFeatureAndAvailability((*it).first, &param_list);
+    }
+  }
+  return param_list;
+}
+
+}  // namespace safe_browsing