Add internals page for DICE

chrome/browser/ui/webui/signin/signin_dice_internals_handler.cc

+// 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/ui/webui/signin/signin_dice_internals_handler.h"
+
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+
+SigninDiceInternalsHandler::SigninDiceInternalsHandler(Profile* profile)
+    : profile_(profile) {
+  DCHECK(profile_);
+  DCHECK(!profile_->IsOffTheRecord());
+}
+
+SigninDiceInternalsHandler::~SigninDiceInternalsHandler() {}
+
+void SigninDiceInternalsHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(
+      "enableSync", base::Bind(&SigninDiceInternalsHandler::HandleEnableSync,
+                               base::Unretained(this)));
+}
+
+void SigninDiceInternalsHandler::HandleEnableSync(const base::ListValue* args) {
+  // TODO(msarda): Implement start syncing.
+  VLOG(1) << "[Dice] Start syncing";
+}