Updater: Fix comment for method ExternalConstants::InitialDelay.

Bug: 1144151
Change-Id: I3608831c649150220385d592f4b8185d6e94692f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2627775
Commit-Queue: Mila Green <milagreen@chromium.org>
Reviewed-by: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843603}

chrome/updater/external_constants.h

@@ -27,11 +27,8 @@ class ExternalConstants {
   // True if client update protocol signing of update checks is enabled.
   virtual bool UseCUP() const = 0;
 
-  // Returns a random value in seconds used to delay the start of the automated
-  // background tasks such as update checks. This distributes the update server
-  // load more uniformly and avoids the problem of a large number of clients
-  // creating load spikes on servers when checking for updates and their system
-  // time is synchronized by a time server.
+  // Number of seconds to delay the start of the automated background tasks
+  // such as update checks.
   virtual int InitialDelay() const = 0;
 
  protected: