Add the ThirdPartyModules.Uninstallable histogram.

chrome/browser/conflicts/third_party_metrics_recorder_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_CONFLICTS_THIRD_PARTY_METRICS_RECORDER_WIN_H_
+#define CHROME_BROWSER_CONFLICTS_THIRD_PARTY_METRICS_RECORDER_WIN_H_
+
+#include "base/macros.h"
+#include "chrome/browser/conflicts/installed_programs_win.h"
+#include "chrome/browser/conflicts/module_database_observer_win.h"
+
+class ModuleDatabase;
+struct ModuleInfoData;
+struct ModuleInfoKey;
+
+// Records metrics about third party modules loaded into Chrome.
+class ThirdPartyMetricsRecorder : public ModuleDatabaseObserver {
+ public:
+  explicit ThirdPartyMetricsRecorder(ModuleDatabase* module_database);
+  ~ThirdPartyMetricsRecorder() override;
+
+  // ModuleDatabaseObserver:
+  void OnNewModuleFound(const ModuleInfoKey& module_key,
+                        const ModuleInfoData& module_data) override;
+
+ private:
+  void OnInstalledProgramsInitialized(ModuleDatabase* module_database);
+
+  // Returns true if |module_data| is a third party module. Third party modules
+  // are defined as not being signed by Google or Microsoft.
+  bool IsThirdPartyModule(const ModuleInfoData& module_data);
+
+  InstalledPrograms installed_programs_;
+
+  DISALLOW_COPY_AND_ASSIGN(ThirdPartyMetricsRecorder);
+};
+
+#endif  // CHROME_BROWSER_CONFLICTS_THIRD_PARTY_METRICS_RECORDER_WIN_H_