Allow component installers to specify a map of installer attributes.

chrome/browser/component_updater/caps_installer_win.cc

Index: chrome/browser/component_updater/caps_installer_win.cc
diff --git a/chrome/browser/component_updater/caps_installer_win.cc b/chrome/browser/component_updater/caps_installer_win.cc
index 7027442a5fe876aba95ea039cf47ab250c227766..255cb9db534b21744bbe31d5d5f9e2fb219545f5 100644
--- a/chrome/browser/component_updater/caps_installer_win.cc
+++ b/chrome/browser/component_updater/caps_installer_win.cc
@@ -107,7 +107,9 @@ class CAPSInstallerTraits : public ComponentInstallerTraits {
   // This string is shown in chrome://components.
   std::string GetName() const override { return "Chrome Crash Service"; }
 
-  std::string GetAp() const override { return std::string(); }
+  update_client::InstallerAttributes GetInstallerAttributes() const override {
+    return update_client::InstallerAttributes();
+  }
 };
 
 }  // namespace