Revert of [Contextual Search] Remove opt-in code.

chrome/browser/search/contextual_search_promo_source_android.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 "chrome/browser/search/contextual_search_promo_source_android.h"
+
+#include <string>
+
+#include "base/json/json_string_value_serializer.h"
+#include "base/memory/ref_counted_memory.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "base/values.h"
+#include "chrome/common/url_constants.h"
+#include "chrome/grit/chromium_strings.h"
+#include "components/variations/variations_associated_data.h"
+#include "grit/browser_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/base/webui/jstemplate_builder.h"
+#include "url/gurl.h"
+
+namespace {
+
+const char kPromoConfigPath[] = "/config.js";
+const char kPromoHTMLPath[] = "/promo.html";
+const char kPromoCSSPath[] = "/promo.css";
+const char kPromoJSPath[] = "/promo.js";
+
+// Field trial related constants.
+const char kContextualSearchFieldTrialName[] = "ContextualSearch";
+const char kContextualSearchHidePromoHeaderParam[] = "hide_promo_header";
+const char kContextualSearchEnabledValue[] = "enabled";
+
+// Returns whether we should hide the first-run promo header.
+bool ShouldHidePromoHeader() {
+  return variations::GetVariationParamValue(
+      kContextualSearchFieldTrialName, kContextualSearchHidePromoHeaderParam) ==
+          kContextualSearchEnabledValue;
+}
+
+// Returns a JS dictionary of configuration data for the Contextual Search
+// promo.
+std::string GetConfigData() {
+  base::DictionaryValue config_data;
+  config_data.SetBoolean("hideHeader", ShouldHidePromoHeader());
+
+  // Serialize the dictionary.
+  std::string js_text;
+  JSONStringValueSerializer serializer(&js_text);
+  serializer.Serialize(config_data);
+
+  std::string config_data_js;
+  config_data_js.append("var config = ");
+  config_data_js.append(js_text);
+  config_data_js.append(";");
+  return config_data_js;
+}
+
+}  // namespace
+
+ContextualSearchPromoSourceAndroid::ContextualSearchPromoSourceAndroid() {}
+
+ContextualSearchPromoSourceAndroid::~ContextualSearchPromoSourceAndroid() {}
+
+void ContextualSearchPromoSourceAndroid::StartDataRequest(
+    const std::string& path_and_query, int render_process_id,
+    int render_frame_id,
+    const content::URLDataSource::GotDataCallback& callback) {
+  GURL url(std::string(chrome::kChromeUIContextualSearchPromoURL) + "/" +
+           path_and_query);
+  std::string path(url.path());
+  if (path == kPromoHTMLPath) {
+    SendHtmlWithStrings(callback);
+  } else if (path == kPromoCSSPath) {
+    SendResource(IDR_CONTEXTUAL_SEARCH_PROMO_CSS, callback);
+  } else if (path == kPromoJSPath) {
+    SendResource(IDR_CONTEXTUAL_SEARCH_PROMO_JS, callback);
+  } else if (path == kPromoConfigPath) {
+    SendConfigResource(callback);
+  } else {
+    callback.Run(NULL);
+  }
+}
+
+std::string ContextualSearchPromoSourceAndroid::GetSource() const {
+  return chrome::kChromeUIContextualSearchPromoHost;
+}
+
+std::string ContextualSearchPromoSourceAndroid::GetMimeType(
+    const std::string& path_and_query) const {
+  std::string path(GURL("chrome://host/" + path_and_query).path());
+  if (EndsWith(path, ".js", false)) return "application/javascript";
+  if (EndsWith(path, ".png", false)) return "image/png";
+  if (EndsWith(path, ".css", false)) return "text/css";
+  if (EndsWith(path, ".html", false)) return "text/html";
+  if (EndsWith(path, ".woff", false)) return "font/woff";
+  if (EndsWith(path, ".woff2", false)) return "font/woff2";
+  return "";
+}
+
+bool ContextualSearchPromoSourceAndroid::ShouldDenyXFrameOptions() const {
+  return false;
+}
+
+bool
+ContextualSearchPromoSourceAndroid::ShouldAddContentSecurityPolicy() const {
+  return false;
+}
+
+void ContextualSearchPromoSourceAndroid::SendResource(
+    int resource_id, const content::URLDataSource::GotDataCallback& callback) {
+  scoped_refptr<base::RefCountedStaticMemory> response(
+      ResourceBundle::GetSharedInstance().LoadDataResourceBytes(resource_id));
+  callback.Run(response.get());
+}
+
+void ContextualSearchPromoSourceAndroid::SendConfigResource(
+    const content::URLDataSource::GotDataCallback& callback) {
+  std::string response = GetConfigData();
+  callback.Run(base::RefCountedString::TakeString(&response));
+}
+
+void ContextualSearchPromoSourceAndroid::SendHtmlWithStrings(
+    const content::URLDataSource::GotDataCallback& callback) {
+  base::DictionaryValue strings_data;
+  // The three following statements are part of the description paragraph.
+  strings_data.SetString(
+      "description-1",
+      l10n_util::GetStringUTF16(IDS_CONTEXTUAL_SEARCH_PROMO_DESCRIPTION_1));
+  strings_data.SetString(
+      "feature-name",
+      l10n_util::GetStringUTF16(IDS_CONTEXTUAL_SEARCH_PROMO_FEATURE_NAME));
+  strings_data.SetString(
+      "description-2",
+      l10n_util::GetStringUTF16(IDS_CONTEXTUAL_SEARCH_PROMO_DESCRIPTION_2));
+
+  strings_data.SetString(
+      "heading", l10n_util::GetStringUTF16(IDS_CONTEXTUAL_SEARCH_HEADER));
+  strings_data.SetString(
+      "optIn", l10n_util::GetStringUTF16(IDS_CONTEXTUAL_SEARCH_PROMO_OPTIN));
+  strings_data.SetString(
+      "optOut", l10n_util::GetStringUTF16(IDS_CONTEXTUAL_SEARCH_PROMO_OPTOUT));
+  base::StringPiece html(
+      ResourceBundle::GetSharedInstance().GetRawDataResource(
+         IDR_CONTEXTUAL_SEARCH_PROMO_HTML));
+  std::string response(webui::GetI18nTemplateHtml(html, &strings_data));
+  callback.Run(base::RefCountedString::TakeString(&response));
+}