Add initial version of chrome://popular-sites-internals page

chrome/browser/ui/webui/popular_sites_internals_message_handler.cc

+// 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/ui/webui/popular_sites_internals_message_handler.h"
+
+#include "base/bind.h"
+#include "base/memory/ref_counted.h"
+#include "base/values.h"
+#include "chrome/browser/android/popular_sites.h"
+#include "chrome/browser/profiles/profile.h"
+#include "content/public/browser/web_ui.h"
+
+PopularSitesInternalsMessageHandler::PopularSitesInternalsMessageHandler() {
+}
+
+PopularSitesInternalsMessageHandler::~PopularSitesInternalsMessageHandler() {}
+
+void PopularSitesInternalsMessageHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback("registerForEvents",
+      base::Bind(&PopularSitesInternalsMessageHandler::HandleRegisterForEvents,
+                 base::Unretained(this)));
+
+  web_ui()->RegisterMessageCallback("download",
+      base::Bind(&PopularSitesInternalsMessageHandler::HandleDownload,
+                 base::Unretained(this)));
+}
+
+void PopularSitesInternalsMessageHandler::HandleRegisterForEvents(
+    const base::ListValue* args) {
+  DCHECK(args->empty());
+
+  std::string country;
+  std::string version;
+  popular_sites_.reset(new PopularSites(
+      Profile::FromWebUI(web_ui()), country, version, std::string(), false,
+      base::Bind(&PopularSitesInternalsMessageHandler::OnPopularSitesAvailable,
+                 base::Unretained(this), false)));
+}
+
+void PopularSitesInternalsMessageHandler::HandleDownload(
+    const base::ListValue* args) {
+  DCHECK_EQ(2u, args->GetSize());
+
+  std::string country;
+  args->GetString(0, &country);
+  std::string version;
+  args->GetString(1, &version);
+  popular_sites_.reset(new PopularSites(
+      Profile::FromWebUI(web_ui()), country, version, std::string(), true,
+      base::Bind(&PopularSitesInternalsMessageHandler::OnPopularSitesAvailable,
+                 base::Unretained(this), true)));
+}
+
+void PopularSitesInternalsMessageHandler::SendDownloadResult(bool success) {
+  base::StringValue result(success ? "Success" : "Fail");
+  web_ui()->CallJavascriptFunction(
+        "chrome.popular_sites_internals.receiveDownloadResult", result);
+}
+
+void PopularSitesInternalsMessageHandler::SendSites() {
+  scoped_ptr<base::ListValue> sites_list(new base::ListValue);
+  for (const PopularSites::Site& site : popular_sites_->sites()) {
+    scoped_ptr<base::DictionaryValue> entry(new base::DictionaryValue);
+    entry->SetString("title", site.title);
+    entry->SetString("url", site.url.spec());
+    sites_list->Append(entry.Pass());
+  }
+
+  base::DictionaryValue result;
+  result.Set("sites", sites_list.Pass());
+  web_ui()->CallJavascriptFunction(
+      "chrome.popular_sites_internals.receiveSites", result);
+}
+
+void PopularSitesInternalsMessageHandler::OnPopularSitesAvailable(
+    bool explicit_request, bool success) {
+  if (explicit_request)
+    SendDownloadResult(success);
+  SendSites();
+}