[Offline Pages] Remove activation time for background loading.

components/offline_pages/core/background/save_page_request.h

Index: components/offline_pages/core/background/save_page_request.h
diff --git a/components/offline_pages/core/background/save_page_request.h b/components/offline_pages/core/background/save_page_request.h
index b1bd54e806ba352beb9bbc765cb66c78d8825a1f..52dee9556a1905a95281a801def35b7c3a874886 100644
--- a/components/offline_pages/core/background/save_page_request.h
+++ b/components/offline_pages/core/background/save_page_request.h
@@ -28,12 +28,6 @@ class SavePageRequest {
                   const ClientId& client_id,
                   const base::Time& creation_time,
                   const bool user_requested);
-  SavePageRequest(int64_t request_id,
-                  const GURL& url,
-                  const ClientId& client_id,
-                  const base::Time& creation_time,
-                  const base::Time& activation_time,
-                  const bool user_requested);
   SavePageRequest(const SavePageRequest& other);
   ~SavePageRequest();
 
@@ -64,8 +58,6 @@ class SavePageRequest {
 
   const base::Time& creation_time() const { return creation_time_; }
 
-  const base::Time& activation_time() const { return activation_time_; }
-
   int64_t started_attempt_count() const { return started_attempt_count_; }
   void set_started_attempt_count(int64_t started_attempt_count) {
     started_attempt_count_ = started_attempt_count;
@@ -106,9 +98,6 @@ class SavePageRequest {
   // Time when this request was created. (Alternative 2).
   base::Time creation_time_;
 
-  // Time when this request will become active.
-  base::Time activation_time_;
-
   // Number of attempts started to get the page.  This may be different than the
   // number of attempts completed because we could crash.
   int started_attempt_count_;