Hold cros_component_installers in browser_process.

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index e84822d425fa75a89bed65f0069f5ef76210b66f..30ee8b1ab7221b7be6ba3e835389499607a7871f 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -979,6 +979,22 @@ BrowserProcessImpl::pnacl_component_installer() {
 #endif
 }
 
+#if defined(OS_CHROMEOS)
+component_updater::DefaultComponentInstaller*
+BrowserProcessImpl::cros_component_installer(
+    const std::string& name,
+    std::unique_ptr<component_updater::ComponentInstallerTraits>
+        installer_traits) {
+  auto it = cros_component_installers_.find(name);
+  if (it == cros_component_installers_.end()) {
+    cros_component_installers_[name] =
+        new component_updater::DefaultComponentInstaller(
+            std::move(installer_traits));
+  }
+  return cros_component_installers_[name].get();
+}
+#endif
+
 component_updater::SupervisedUserWhitelistInstaller*
 BrowserProcessImpl::supervised_user_whitelist_installer() {
   if (!supervised_user_whitelist_installer_) {