Add support for the ExperimentalSwReporterEngine field trial.

chrome/browser/component_updater/sw_reporter_installer_win.h

Index: chrome/browser/component_updater/sw_reporter_installer_win.h
diff --git a/chrome/browser/component_updater/sw_reporter_installer_win.h b/chrome/browser/component_updater/sw_reporter_installer_win.h
index 7427e5a994258c2ae34bdd31839ced2898ceac66..ea4fcb3ea1b95db45fbea039350c2d5bba963387 100644
--- a/chrome/browser/component_updater/sw_reporter_installer_win.h
+++ b/chrome/browser/component_updater/sw_reporter_installer_win.h
@@ -42,12 +42,10 @@ using SwReporterRunner =
 
 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;
@@ -64,7 +62,13 @@ class SwReporterInstallerTraits : public ComponentInstallerTraits {
   update_client::InstallerAttributes GetInstallerAttributes() const override;
   std::vector<std::string> GetMimeTypes() const override;
 
+ private:
+  friend class SwReporterInstallerTest;
+
+  bool IsExperimentalEngineEnabled() const;

[grt (UTC plus 2), 2016/08/25 15:42:13]

  // Returns true if the experimental engine is supported and the Feature is
enabled.
or something like that

[Joe Mason, 2016/08/25 17:52:59]

Done.

+
   SwReporterRunner reporter_runner_;
+  bool is_experimental_engine_supported_;

[Sorin Jianu, 2016/08/25 03:04:29]

can this be const?

[Joe Mason, 2016/08/25 15:50:05]

Done.

 
   DISALLOW_COPY_AND_ASSIGN(SwReporterInstallerTraits);
 };