Primary histograms for InBrowserCleanerUI experiment

chrome/browser/safe_browsing/chrome_cleaner/chrome_cleaner_controller_win.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_CHROME_CLEANER_CHROME_CLEANER_CONTROLLER_WIN_H_
 #define CHROME_BROWSER_SAFE_BROWSING_CHROME_CLEANER_CHROME_CLEANER_CONTROLLER_WIN_H_
 
 #include <memory>
 #include <set>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/safe_browsing/chrome_cleaner/chrome_cleaner_runner_win.h"
 #include "chrome/browser/safe_browsing/chrome_cleaner/reporter_runner_win.h"
 #include "components/chrome_cleaner/public/interfaces/chrome_prompt.mojom.h"
 
 class Profile;
 
 namespace safe_browsing {
 
+// These values are used to send UMA information and are replicated in the
+// histograms.xml file, so the order MUST NOT CHANGE.
+enum CleanupStartedHistogramValue {
+  CLEANUP_STARTED_FROM_PROMPT_DIALOG = 0,
+  CLEANUP_STARTED_FROM_PROMPT_IN_SETTINGS = 1,
+
+  CLEANUP_STARTED_MAX,
+};
+
+// Records a SoftwareReporter.CleanupStarted histogram.
+void RecordCleanupStartedHistogram(CleanupStartedHistogramValue value);
+
 // Delegate class that provides services to the ChromeCleanerController class
 // and can be overridden by tests via
 // SetChromeCleanerControllerDelegateForTesting().
 class ChromeCleanerControllerDelegate {
  public:
   using FetchedCallback = base::OnceCallback<void(base::FilePath)>;
 
   ChromeCleanerControllerDelegate();
   virtual ~ChromeCleanerControllerDelegate();
 
@@ skipping 204 matching lines @@
   THREAD_CHECKER(thread_checker_);
 
   base::WeakPtrFactory<ChromeCleanerController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeCleanerController);
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_CHROME_CLEANER_CHROME_CLEANER_CONTROLLER_WIN_H_