Add the ThirdPartyModules.Uninstallable histogram.

chrome/browser/conflicts/module_database_observer_win.h

Index: chrome/browser/conflicts/module_database_observer_win.h
diff --git a/chrome/browser/conflicts/module_database_observer_win.h b/chrome/browser/conflicts/module_database_observer_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..b13bc2e6212251e96fd21a15e1bc8f6afed795c6
--- /dev/null
+++ b/chrome/browser/conflicts/module_database_observer_win.h
@@ -0,0 +1,17 @@
+// 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_MODULE_DATABASE_OBSERVER_WIN_H_
+#define CHROME_BROWSER_CONFLICTS_MODULE_DATABASE_OBSERVER_WIN_H_
+
+struct ModuleInfoKey;
+struct ModuleInfoData;
+
+class ModuleDatabaseObserver {
+ public:
+  virtual void OnNewModuleFound(const ModuleInfoKey& module_key,
+                                const ModuleInfoData& module_data) = 0;
+};
+
+#endif  // CHROME_BROWSER_CONFLICTS_MODULE_DATABASE_OBSERVER_WIN_H_