[Offline Pages] Delete associated page along with bookmark.

chrome/browser/bookmarks/chrome_bookmark_client.h

Index: chrome/browser/bookmarks/chrome_bookmark_client.h
diff --git a/chrome/browser/bookmarks/chrome_bookmark_client.h b/chrome/browser/bookmarks/chrome_bookmark_client.h
index 621f408fc0b2b1298b6ecbd891324130e54bff23..9e45bc4204341237692c9fb2321222b99585ce96 100644
--- a/chrome/browser/bookmarks/chrome_bookmark_client.h
+++ b/chrome/browser/bookmarks/chrome_bookmark_client.h
@@ -10,6 +10,9 @@
 
 #include "base/deferred_sequenced_task_runner.h"
 #include "base/macros.h"
+#include "build/build_config.h"
+#include "build/buildflag.h"
+#include "chrome/common/features.h"
 #include "components/bookmarks/browser/bookmark_client.h"
 
 class GURL;
@@ -26,6 +29,12 @@ class BookmarkPermanentNode;
 class ManagedBookmarkService;
 }
 
+#if BUILDFLAG(ANDROID_JAVA_UI)
+namespace offline_pages {
+class OfflinePageBookmarkObserver;
+}
+#endif
+
 class ChromeBookmarkClient : public bookmarks::BookmarkClient {
  public:
   ChromeBookmarkClient(
@@ -62,6 +71,12 @@ class ChromeBookmarkClient : public bookmarks::BookmarkClient {
   // be null during testing.
   bookmarks::ManagedBookmarkService* managed_bookmark_service_;
 
+#if BUILDFLAG(ANDROID_JAVA_UI)
+  // Owns the observer used by Offline Page listening to Bookmark Model events.
+  std::unique_ptr<offline_pages::OfflinePageBookmarkObserver>
+      offline_page_observer_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(ChromeBookmarkClient);
 };