Add support for the ExperimentalSwReporterEngine field trial.

chrome/browser/component_updater/sw_reporter_installer_win.h

 // Copyright (c) 2014 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_COMPONENT_UPDATER_SW_REPORTER_INSTALLER_WIN_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_SW_REPORTER_INSTALLER_WIN_H_
 
 #include <stdint.h>
 #include <memory>
 #include <string>
@@ skipping 17 matching lines @@
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace component_updater {
 
 class ComponentUpdateService;
 
+// These MUST match the values for SwReporterExperimentError in histograms.xml.
+// Exposed for testing.
+enum SwReporterExperimentError {
+  SW_REPORTER_EXPERIMENT_ERROR_BAD_TAG = 0,
+  SW_REPORTER_EXPERIMENT_ERROR_BAD_PARAMS = 1,
+  SW_REPORTER_EXPERIMENT_ERROR_MAX,
+};
+
 // Callback for running the software reporter after it is downloaded.
 using SwReporterRunner =
     base::Callback<void(const safe_browsing::SwReporterInvocation& invocation,
                         const base::Version& version)>;
 
 class SwReporterInstallerTraits : public ComponentInstallerTraits {
  public:
-  explicit SwReporterInstallerTraits(const SwReporterRunner& reporter_runner);
+  SwReporterInstallerTraits(const SwReporterRunner& reporter_runner,
+                            bool is_experimental_engine_supported);
   ~SwReporterInstallerTraits() override;
 
- private:
-  friend class SwReporterInstallerTest;
-
   // ComponentInstallerTraits implementation.
   bool VerifyInstallation(const base::DictionaryValue& manifest,
                           const base::FilePath& dir) const override;
   bool SupportsGroupPolicyEnabledComponentUpdates() const override;
   bool RequiresNetworkEncryption() const override;
   bool OnCustomInstall(const base::DictionaryValue& manifest,
                        const base::FilePath& install_dir) override;
   void ComponentReady(const base::Version& version,
                       const base::FilePath& install_dir,
                       std::unique_ptr<base::DictionaryValue> manifest) override;
   base::FilePath GetRelativeInstallDir() const override;
   void GetHash(std::vector<uint8_t>* hash) const override;
   std::string GetName() const override;
   update_client::InstallerAttributes GetInstallerAttributes() const override;
   std::vector<std::string> GetMimeTypes() const override;
 
+ private:
+  friend class SwReporterInstallerTest;
+
+  // Returns true if the experimental engine is supported and the Feature is
+  // enabled.
+  bool IsExperimentalEngineEnabled() const;
+
   SwReporterRunner reporter_runner_;
+  const bool is_experimental_engine_supported_;
 
   DISALLOW_COPY_AND_ASSIGN(SwReporterInstallerTraits);
 };
 
 // Call once during startup to make the component update service aware of the
 // SwReporter.
 void RegisterSwReporterComponent(ComponentUpdateService* cus);
 
 // Register local state preferences related to the SwReporter.
 void RegisterPrefsForSwReporter(PrefRegistrySimple* registry);
 
 // Register profile preferences related to the SwReporter.
 void RegisterProfilePrefsForSwReporter(
     user_prefs::PrefRegistrySyncable* registry);
 
 }  // namespace component_updater
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_SW_REPORTER_INSTALLER_WIN_H_