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diff --git a/chromium/components/policy/core/browser/webui/json_generation.h b/chromium/components/policy/core/browser/webui/json_generation.h
new file mode 100644
index 00000000000..3bdcabe2780
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+++ b/chromium/components/policy/core/browser/webui/json_generation.h
@@ -0,0 +1,78 @@
+// Copyright 2021 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.
+
+#ifndef COMPONENTS_POLICY_CORE_BROWSER_WEBUI_JSON_GENERATION_H_
+#define COMPONENTS_POLICY_CORE_BROWSER_WEBUI_JSON_GENERATION_H_
+
+#include <string>
+
+#include "components/policy/policy_export.h"
+#include "third_party/abseil-cpp/absl/types/optional.h"
+
+namespace base {
+class Value;
+}
+
+namespace policy {
+class PolicyConversionsClient;
+
+// Simple object containing parameters used to generate a string of JSON from
+// a set of policies.
+struct POLICY_EXPORT JsonGenerationParams {
+  explicit JsonGenerationParams();
+  ~JsonGenerationParams();
+
+  JsonGenerationParams& with_application_name(
+      const std::string& other_application_name) {
+    application_name = other_application_name;
+    return *this;
+  }
+
+  JsonGenerationParams& with_channel_name(
+      const std::string& other_channel_name) {
+    channel_name = other_channel_name;
+    return *this;
+  }
+
+  JsonGenerationParams& with_processor_variation(
+      const std::string& other_processor_variation) {
+    processor_variation = other_processor_variation;
+    return *this;
+  }
+
+  JsonGenerationParams& with_cohort_name(const std::string& other_cohort_name) {
+    cohort_name = other_cohort_name;
+    return *this;
+  }
+
+  JsonGenerationParams& with_os_name(const std::string& other_os_name) {
+    os_name = other_os_name;
+    return *this;
+  }
+
+  JsonGenerationParams& with_platform_name(
+      const std::string& other_platform_name) {
+    platform_name = other_platform_name;
+    return *this;
+  }
+
+  std::string application_name;
+  std::string channel_name;
+  std::string processor_variation;
+  absl::optional<std::string> cohort_name;
+  absl::optional<std::string> os_name;
+  absl::optional<std::string> platform_name;
+};
+
+// Generates a string of JSON containing the currently applied policies along
+// with additional metadata about the current device/build, based both on what
+// is stored in |params| and also information that is statically available.
+POLICY_EXPORT std::string GenerateJson(
+    std::unique_ptr<PolicyConversionsClient> client,
+    base::Value status,
+    const JsonGenerationParams& params);
+
+}  // namespace policy
+
+#endif  // COMPONENTS_POLICY_CORE_BROWSER_WEBUI_JSON_GENERATION_H_