Remove Quirks flag, limit server retries

components/quirks/quirks_client.cc

Index: components/quirks/quirks_client.cc
diff --git a/components/quirks/quirks_client.cc b/components/quirks/quirks_client.cc
index 383c91126a6c7bfd254c38dbb54187ce3fe06901..17ca7416e25e825b3f16750711341fd99b8e09b9 100644
--- a/components/quirks/quirks_client.cc
+++ b/components/quirks/quirks_client.cc
@@ -25,6 +25,8 @@ const char kQuirksUrlFormat[] =
     "https://chromeosquirksserver-pa.googleapis.com/v2/display/%s/clients"
     "/chromeos/M%d";
 
+const int kMaxServerFailures = 10;
+
 const net::BackoffEntry::Policy kDefaultBackoffPolicy = {
     1,                // Initial errors before applying backoff
     10000,            // 10 seconds.
@@ -111,6 +113,12 @@ void QuirksClient::OnURLFetchComplete(const net::URLFetcher* source) {
   }
 
   if (server_error) {
+    if (backoff_entry_.failure_count() >= kMaxServerFailures) {
+      // After 10 retires (5+ hours), give up, and try again in a month.
+      VLOG(1) << "Too many retries; Quirks Client shutting down.";
+      Shutdown(false);
+      return;
+    }
     url_fetcher_.reset();
     Retry();
     return;