Fix recovery component DCHECK on mac OS during browser start up.

It fails an assert in component updater service when the recovery component is registered.
https://chromium-review.googlesource.com/1787402 introduced Omaha-style app ids. However,
the recovery component code was not modify to use appids, and the it fails to register
because the member update_client::CrxComponent::app_id is not set.

TBR=waffles
BUG=1015073,1001126

Change-Id: If5f0c1a7ba2778b5183156d64fd57d745dc099ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865552Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706931}

chrome/browser/component_updater/recovery_component_installer.cc

@@ -305,6 +305,7 @@ void RecoveryRegisterHelper(ComponentUpdateService* cus, PrefService* prefs) {
   recovery.version = version;
   recovery.pk_hash.assign(kRecoverySha2Hash,
                           &kRecoverySha2Hash[sizeof(kRecoverySha2Hash)]);
+  recovery.app_id = update_client::GetCrxIdFromPublicKeyHash(recovery.pk_hash);
   recovery.supports_group_policy_enable_component_updates = true;
   recovery.requires_network_encryption = false;
   recovery.crx_format_requirement =