Remove dependency on visitedlink from history

chrome/browser/history/content_visit_delegate.cc

Index: chrome/browser/history/content_visit_delegate.cc
diff --git a/chrome/browser/history/content_visit_delegate.cc b/chrome/browser/history/content_visit_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6bd393507858886ff40619d07bacd1ad7d5d42b2
--- /dev/null
+++ b/chrome/browser/history/content_visit_delegate.cc
@@ -0,0 +1,121 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/history/content_visit_delegate.h"
+
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "chrome/browser/history/history_backend.h"
+#include "chrome/browser/history/history_service.h"
+#include "components/history/core/browser/history_database.h"
+#include "components/history/core/browser/history_db_task.h"
+#include "components/visitedlink/browser/visitedlink_master.h"
+#include "url/gurl.h"
+
+namespace {
+
+// URLIterator from std::vector<GURL>
+class URLIteratorFromURLs : public visitedlink::VisitedLinkMaster::URLIterator {
+ public:
+  explicit URLIteratorFromURLs(const std::vector<GURL>& urls)
+      : itr_(urls.begin()), end_(urls.end()) {}
+
+  // visitedlink::VisitedLinkMaster::URLIterator implementation.
+  const GURL& NextURL() override { return *(itr_++); }
+  bool HasNextURL() const override { return itr_ != end_; }
+
+ private:
+  std::vector<GURL>::const_iterator itr_;
+  std::vector<GURL>::const_iterator end_;
+
+  DISALLOW_COPY_AND_ASSIGN(URLIteratorFromURLs);
+};
+
+// IterateUrlsDBTask bridge HistoryBackend::URLEnumerator to
+// visitedlink::VisitedLinkDelegate::URLEnumerator.
+class IterateUrlsDBTask : public history::HistoryDBTask {
+ public:
+  explicit IterateUrlsDBTask(const scoped_refptr<
+      visitedlink::VisitedLinkDelegate::URLEnumerator>& enumerator);
+  ~IterateUrlsDBTask() override;
+
+ private:
+  // Implementation of history::HistoryDBTask.
+  bool RunOnDBThread(history::HistoryBackend* backend,
+                     history::HistoryDatabase* db) override;
+  void DoneRunOnMainThread() override;
+
+  scoped_refptr<visitedlink::VisitedLinkDelegate::URLEnumerator> enumerator_;
+
+  DISALLOW_COPY_AND_ASSIGN(IterateUrlsDBTask);
+};
+
+IterateUrlsDBTask::IterateUrlsDBTask(const scoped_refptr<
+    visitedlink::VisitedLinkDelegate::URLEnumerator>& enumerator)
+    : enumerator_(enumerator) {
+}
+
+IterateUrlsDBTask::~IterateUrlsDBTask() {
+}
+
+bool IterateUrlsDBTask::RunOnDBThread(history::HistoryBackend* backend,
+                                      history::HistoryDatabase* db) {
+  bool success = false;
+  if (db) {
+    history::HistoryDatabase::URLEnumerator iter;
+    if (db->InitURLEnumeratorForEverything(&iter)) {
+      history::URLRow row;
+      while (iter.GetNextURL(&row))
+        enumerator_->OnURL(row.url());
+      success = true;
+    }
+  }
+  enumerator_->OnComplete(success);
+  return true;
+}
+
+void IterateUrlsDBTask::DoneRunOnMainThread() {
+}
+
+}  // namespace
+
+ContentVisitDelegate::ContentVisitDelegate(
+    content::BrowserContext* browser_context)
+    : history_service_(nullptr),
+      visitedlink_master_(
+          new visitedlink::VisitedLinkMaster(browser_context, this, true)) {
+}
+
+ContentVisitDelegate::~ContentVisitDelegate() {
+}
+
+bool ContentVisitDelegate::Init(HistoryService* history_service) {
+  DCHECK(history_service);
+  history_service_ = history_service;
+  return visitedlink_master_->Init();
+}
+
+void ContentVisitDelegate::AddURL(const GURL& url) {
+  visitedlink_master_->AddURL(url);
+}
+
+void ContentVisitDelegate::AddURLs(const std::vector<GURL>& urls) {
+  visitedlink_master_->AddURLs(urls);
+}
+
+void ContentVisitDelegate::DeleteURLs(const std::vector<GURL>& urls) {
+  URLIteratorFromURLs iterator(urls);
+  visitedlink_master_->DeleteURLs(&iterator);
+}
+
+void ContentVisitDelegate::DeleteAllURLs() {
+  visitedlink_master_->DeleteAllURLs();
+}
+
+void ContentVisitDelegate::RebuildTable(
+    const scoped_refptr<URLEnumerator>& enumerator) {
+  DCHECK(history_service_);
+  scoped_ptr<history::HistoryDBTask> task(new IterateUrlsDBTask(enumerator));
+  history_service_->ScheduleDBTask(task.Pass(), &task_tracker_);
+}