Add the ThirdPartyModules.Uninstallable histogram.

chrome/browser/conflicts/third_party_metrics_recorder_win.cc

+// 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.
+
+#include "chrome/browser/conflicts/third_party_metrics_recorder_win.h"
+
+#include <vector>
+
+#include "base/bind.h"
+#include "base/metrics/histogram_macros.h"
+#include "base/strings/string16.h"
+#include "base/strings/string_util.h"
+#include "chrome/browser/conflicts/module_database_win.h"
+#include "chrome/browser/conflicts/module_info_win.h"
+
+ThirdPartyMetricsRecorder::ThirdPartyMetricsRecorder(
+    ModuleDatabase* module_database) {
+  // base::Unretained() is safe here because ThirdPartyMetricsRecorder owns
+  // |installed_programs_| and the callback won't be invoked if this instance is
+  // destroyed.
+  installed_programs_.Initialize(
+      base::Bind(&ThirdPartyMetricsRecorder::OnInstalledProgramsInitialized,
+                 base::Unretained(this), module_database));
+}
+
+ThirdPartyMetricsRecorder::~ThirdPartyMetricsRecorder() = default;
+
+void ThirdPartyMetricsRecorder::OnNewModuleFound(
+    const ModuleInfoKey& module_key,
+    const ModuleInfoData& module_data) {
+  if (!IsThirdPartyModule(module_data))
+    return;
+
+  std::vector<base::string16> program_names;
+  bool uninstallable = installed_programs_.GetInstalledProgramNames(
+      module_key.module_path, &program_names);
+  UMA_HISTOGRAM_BOOLEAN("ThirdPartyModules.Uninstallable", uninstallable);
+}
+
+bool ThirdPartyMetricsRecorder::IsThirdPartyModule(
+    const ModuleInfoData& module_data) {
+  static const wchar_t kMicrosoft[] = L"Microsoft ";
+  static const wchar_t kGoogle[] = L"Google Inc";
+
+  const base::string16& certificate_subject =
+      module_data.inspection_result->certificate_info.subject;
+
+  // Check if the signer name begins with "Microsoft ". Signatures are
+  // typically "Microsoft Corporation" or "Microsoft Windows", but others
+  // may exist.
+  if (base::StartsWith(certificate_subject, kMicrosoft,
+                       base::CompareCase::SENSITIVE))
+    return false;
+
+  return certificate_subject != kGoogle;
+}
+
+void ThirdPartyMetricsRecorder::OnInstalledProgramsInitialized(
+    ModuleDatabase* module_database) {
+  module_database->AddObserver(this);
+}