Inject CanAddURLToHistory into TopSitesImpl

components/history/core/browser/top_sites_impl.h

Index: components/history/core/browser/top_sites_impl.h
diff --git a/chrome/browser/history/top_sites_impl.h b/components/history/core/browser/top_sites_impl.h
similarity index 95%
rename from chrome/browser/history/top_sites_impl.h
rename to components/history/core/browser/top_sites_impl.h
index 60e40b66c45fe1b093714569e26c73a0d53f4d08..e28ceb59d4c68e00fc9c489ef98a1a1bcca2dcbe 100644
--- a/chrome/browser/history/top_sites_impl.h
+++ b/components/history/core/browser/top_sites_impl.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_HISTORY_TOP_SITES_IMPL_H_
-#define CHROME_BROWSER_HISTORY_TOP_SITES_IMPL_H_
+#ifndef COMPONENTS_HISTORY_CORE_BROWSER_TOP_SITES_IMPL_H_
+#define COMPONENTS_HISTORY_CORE_BROWSER_TOP_SITES_IMPL_H_
 
 #include <list>
 #include <set>
@@ -53,10 +53,15 @@ class TopSitesImplTest;
 // db using TopSitesBackend.
 class TopSitesImpl : public TopSites, public HistoryServiceObserver {
  public:
+  // Called to check whether an URL can be added to the history. Must be
+  // callable multiple time and during the whole lifetime of TopSitesImpl.
+  using CanAddURLToHistoryFn = base::Callback<bool(const GURL&)>;
+
   TopSitesImpl(PrefService* pref_service,
                HistoryService* history_service,
                const char* blacklist_pref_name,
-               const PrepopulatedPageList& prepopulated_pages);
+               const PrepopulatedPageList& prepopulated_pages,
+               const CanAddURLToHistoryFn& can_add_url_to_history);
 
   // Initializes TopSitesImpl.
   void Init(const base::FilePath& db_name,
@@ -294,6 +299,9 @@ class TopSitesImpl : public TopSites, public HistoryServiceObserver {
   // must outlive TopSitesImpl.
   HistoryService* history_service_;
 
+  // Can URL be added to the history?
+  CanAddURLToHistoryFn can_add_url_to_history_;
+
   // Are we loaded?
   bool loaded_;
 
@@ -309,4 +317,4 @@ class TopSitesImpl : public TopSites, public HistoryServiceObserver {
 
 }  // namespace history
 
-#endif  // CHROME_BROWSER_HISTORY_TOP_SITES_IMPL_H_
+#endif  // COMPONENTS_HISTORY_CORE_BROWSER_TOP_SITES_IMPL_H_