Introduce a Doodle Fetcher for NTP

chrome/browser/search/instant_service.cc

Index: chrome/browser/search/instant_service.cc
diff --git a/chrome/browser/search/instant_service.cc b/chrome/browser/search/instant_service.cc
index 4a1c3b142c8ca4076e58b0b8ee88481487c72826..4ba48bb4fb818caa5c67b2485c14c7b3fa32bd97 100644
--- a/chrome/browser/search/instant_service.cc
+++ b/chrome/browser/search/instant_service.cc
@@ -5,9 +5,12 @@
 #include "chrome/browser/search/instant_service.h"
 
 #include <stddef.h>
+#include <string>
+#include <utility>
 
 #include "base/bind.h"
 #include "base/feature_list.h"
+#include "base/json/json_reader.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/favicon/fallback_icon_service_factory.h"
@@ -33,6 +36,7 @@
 #include "chrome/browser/ui/webui/theme_source.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/grit/theme_resources.h"
+#include "components/doodle/doodle_fetcher.h"
 #include "components/favicon/core/fallback_icon_service.h"
 #include "components/favicon/core/large_icon_service.h"
 #include "components/history/core/browser/top_sites.h"
@@ -62,6 +66,19 @@ namespace {
 const base::Feature kNtpTilesFeature{"NTPTilesInInstantService",
                                      base::FEATURE_DISABLED_BY_DEFAULT};
 
+void ParseJson(
+    const std::string& json,
+    const base::Callback<void(std::unique_ptr<base::Value>)>& success_callback,
+    const base::Callback<void(const std::string&)>& error_callback) {
+  base::JSONReader json_reader;
+  std::unique_ptr<base::Value> value = json_reader.ReadToValue(json);
+  if (value) {
+    success_callback.Run(std::move(value));
+  } else {
+    error_callback.Run(json_reader.GetErrorMessage());
+  }
+}
+
 }  // namespace
 
 InstantService::InstantService(Profile* profile)
@@ -148,6 +165,20 @@ InstantService::InstantService(Profile* profile)
   content::URLDataSource::Add(
       profile_, new LargeIconSource(fallback_icon_service, large_icon_service));
   content::URLDataSource::Add(profile_, new MostVisitedIframeSource());
+
+  DoodleFetcher doodle_fetcher(profile_->GetRequestContext(),
+                               base::Bind(ParseJson));
+  LOG(ERROR) << "DEBUG DoodleFetcher: Fetcher created.";
+  doodle_fetcher.FetchDoodle(base::Bind([](DoodleConfig config) {
+    if (config.error_during_fetch) {
+      LOG(ERROR) << "DEBUG DoodleFetcher: Error during fetch.";
+    }
+    LOG(ERROR) << "DEBUG DoodleFetcher: config.search_url="
+               << config.search_url;
+    LOG(ERROR) << "DEBUG DoodleFetcher: config.large_image.url="
+               << config.large_image.url;
+  }));
+  LOG(ERROR) << "DEBUG DoodleFetcher: Fetch started.";
 }
 
 InstantService::~InstantService() {