Implement server-suggested update check backoff

chrome/browser/android/webapk/webapk_installer.cc

Index: chrome/browser/android/webapk/webapk_installer.cc
diff --git a/chrome/browser/android/webapk/webapk_installer.cc b/chrome/browser/android/webapk/webapk_installer.cc
index b7933f47c80c540f71436a80b5e5dbf2782cde7d..a518d1e15bcd7a74d3c232b28b61a3db111bbc79 100644
--- a/chrome/browser/android/webapk/webapk_installer.cc
+++ b/chrome/browser/android/webapk/webapk_installer.cc
@@ -353,6 +353,7 @@ WebApkInstaller::WebApkInstaller(content::BrowserContext* browser_context,
       server_url_(GetServerUrl()),
       webapk_download_url_timeout_ms_(kWebApkDownloadUrlTimeoutMs),
       download_timeout_ms_(kDownloadTimeoutMs),
+      infrequent_updates_(false),
       task_type_(UNDEFINED),
       weak_ptr_factory_(this) {
   CreateJavaRef();
@@ -418,6 +419,7 @@ void WebApkInstaller::OnURLFetchComplete(const net::URLFetcher* source) {
   }
 

[pkotwicz, 2017/02/10 02:51:22]

We should set |less_updates_| from within the

if (task_type_ == UPDATE && signed_download_url.is_empty()) {} statement in
https://codereview.chromium.org/2632243004

[Xi Han, 2017/02/13 22:56:14]

Done.

   GURL signed_download_url(response->signed_download_url());
+  infrequent_updates_ = response->infrequent_updates();
   // https://crbug.com/680131. The server sends an empty URL if the server does
   // not have a newer WebAPK to update to.
   if (task_type_ == UPDATE && signed_download_url.is_empty()) {
@@ -621,11 +623,13 @@ void WebApkInstaller::OnTimeout() {
 }
 
 void WebApkInstaller::OnSuccess() {
-  finish_callback_.Run(true, webapk_package_);
+  FinishCallbackData data = {webapk_package_, infrequent_updates_};
+  finish_callback_.Run(true, data);
   delete this;
 }
 
 void WebApkInstaller::OnFailure() {
-  finish_callback_.Run(false, webapk_package_);
+  FinishCallbackData data = {webapk_package_, infrequent_updates_};
+  finish_callback_.Run(false, data);
   delete this;
 }