Implement server-suggested update check backoff

chrome/browser/android/banners/app_banner_infobar_delegate_android.h

Index: chrome/browser/android/banners/app_banner_infobar_delegate_android.h
diff --git a/chrome/browser/android/banners/app_banner_infobar_delegate_android.h b/chrome/browser/android/banners/app_banner_infobar_delegate_android.h
index a83b9c8ef42d519413253f91387681e695e6e981..bf7e2027770d0fec9221f01018f9df12c7555d5f 100644
--- a/chrome/browser/android/banners/app_banner_infobar_delegate_android.h
+++ b/chrome/browser/android/banners/app_banner_infobar_delegate_android.h
@@ -122,7 +122,8 @@ class AppBannerInfoBarDelegateAndroid : public ConfirmInfoBarDelegate {
   bool TriggeredFromBanner() const;
   void SendBannerAccepted();
   void OnWebApkInstallFinished(bool success,

[dominickn, 2017/02/14 04:13:34]

An aside: the argument ordering here is a little unintuitive. At some point, can
the webapk_package_name be first, and the bools together (not necessarily in
this CL)?

[Xi Han, 2017/02/14 22:25:47]

I move the webapk_package_name to be the last one, and put the two bool
together. Is it ok?

-                               const std::string& webapk_package_name);
+                               const std::string& webapk_package_name,
+                               bool less_updates);

[dominickn, 2017/02/14 04:13:34]

relax_updates

[Xi Han, 2017/02/14 22:25:47]

Done.

   void TrackWebApkInstallationDismissEvents(InstallState install_state);
 
   // ConfirmInfoBarDelegate: