Move TopSites api from c/b/history to c/b/e/api

chrome/browser/history/top_sites_extension_api.cc

-// Copyright (c) 2012 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/top_sites_extension_api.h"
-
-#include "base/bind.h"
-#include "base/values.h"
-#include "chrome/browser/history/top_sites.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
-
-GetTopSitesFunction::GetTopSitesFunction()
-    : ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {}
-
-GetTopSitesFunction::~GetTopSitesFunction() {}
-
-bool GetTopSitesFunction::RunImpl() {
-  history::TopSites* ts = profile()->GetTopSites();
-  if (!ts)
-    return false;
-
-  ts->GetMostVisitedURLs(
-      base::Bind(&GetTopSitesFunction::OnMostVisitedURLsAvailable,
-                 weak_ptr_factory_.GetWeakPtr()));
-  return true;
-}
-
-void GetTopSitesFunction::OnMostVisitedURLsAvailable(
-    const history::MostVisitedURLList& data) {
-  scoped_ptr<base::ListValue> pages_value(new ListValue);
-  for (size_t i = 0; i < data.size(); i++) {
-    const history::MostVisitedURL& url = data[i];
-    if (!url.url.is_empty()) {
-      DictionaryValue* page_value = new DictionaryValue();
-      page_value->SetString("url", url.url.spec());
-      if (url.title.empty())
-        page_value->SetString("title", url.url.spec());
-      else
-        page_value->SetString("title", url.title);
-      pages_value->Append(page_value);
-    }
-  }
-
-  SetResult(pages_value.release());
-  SendResponse(true);
-}