Add a class to parse answer json.

components/omnibox/search_suggestion_parser_unittest.cc

-// Copyright 2014 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 "components/omnibox/search_suggestion_parser.h"
-
-#include "base/json/json_reader.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/values.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "url/gurl.h"
-
-namespace {
-
-scoped_ptr<base::DictionaryValue> AsDictionary(const std::string& json) {
-  base::Value* value = base::JSONReader::Read(json);
-  base::DictionaryValue* dict;
-  if (value && value->GetAsDictionary(&dict))
-    return scoped_ptr<base::DictionaryValue>(dict);
-
-  delete value;
-  return scoped_ptr<base::DictionaryValue>(new base::DictionaryValue);
-}
-
-}  // namespace
-
-TEST(SearchSuggestionParser, GetAnswersImageURLsWithoutImagelines) {
-  std::vector<GURL> urls;
-
-  // No "l" entry in the dictionary.
-  SearchSuggestionParser::GetAnswersImageURLs(AsDictionary("").get(), &urls);
-  EXPECT_TRUE(urls.empty());
-
-  // Empty "l" entry in the dictionary.
-  SearchSuggestionParser::GetAnswersImageURLs(
-      AsDictionary("{ \"l\" : {} } ").get(), &urls);
-  EXPECT_TRUE(urls.empty());
-}
-
-TEST(SearchSuggestionParser, GetAnswersImageURLsWithValidImage) {
-  std::vector<GURL> urls;
-
-  const char answer_json[] =
-      "{ \"l\" : [{\"il\": { \"i\": {\"d\": "
-      "\"//ssl.gstatic.com/foo.png\",\"t\": 3}}}]}";
-  SearchSuggestionParser::GetAnswersImageURLs(AsDictionary(answer_json).get(),
-                                              &urls);
-  ASSERT_EQ(1U, urls.size());
-  EXPECT_EQ("https://ssl.gstatic.com/foo.png", urls[0].spec());
-}