Clipboard Android - Store and Read Last Modified Time from Prefs

chrome/browser/android/preferences/clipboard_android.cc

Index: chrome/browser/android/preferences/clipboard_android.cc
diff --git a/chrome/browser/android/preferences/clipboard_android.cc b/chrome/browser/android/preferences/clipboard_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9e5882f8bad43a47f2f3ed2eda7e99b5e3cc6350
--- /dev/null
+++ b/chrome/browser/android/preferences/clipboard_android.cc
@@ -0,0 +1,43 @@
+// Copyright 2017 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/android/preferences/clipboard_android.h"
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/time/time.h"
+#include "chrome/common/pref_names.h"
+#include "components/prefs/pref_registry_simple.h"
+#include "components/prefs/pref_service.h"
+#include "ui/base/clipboard/clipboard.h"
+#include "ui/base/clipboard/clipboard_android.h"
+
+namespace {
+
+void HandleClipboardModified(PrefService* local_state, base::Time time) {
+  local_state->SetInt64(prefs::kClipboardLastModifiedTime,
+                        time.ToInternalValue());
+}
+
+}  // namespace
+
+namespace android {
+
+void RegisterClipboardAndroidPrefs(PrefRegistrySimple* registry) {
+  registry->RegisterInt64Pref(prefs::kClipboardLastModifiedTime, 0u);
+}
+
+void InitClipboardAndroidFromLocalState(PrefService* local_state) {
+  DCHECK(local_state);
+  // Given the context, the cast is guaranteed to succeed.
+  ui::ClipboardAndroid* clipboard =
+      static_cast<ui::ClipboardAndroid*>(ui::Clipboard::GetForCurrentThread());
+  clipboard->SetLastModifiedTimeWithoutRunningCallback(
+      base::Time::FromInternalValue(
+          local_state->GetInt64(prefs::kClipboardLastModifiedTime)));
+  clipboard->SetModifiedCallback(
+      base::Bind(&HandleClipboardModified, local_state));
+}
+
+}  // namespace android