Adding client code for new desktop First Run Experience.

chrome/browser/ui/webui/welcome_ui.cc

+// Copyright (c) 2016 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/welcome_ui.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/web_ui_data_source.h"
+#include "grit/browser_resources.h"
+#include "grit/chrome_unscaled_resources.h"
+#include "grit/chromium_strings.h"
+#include "grit/generated_resources.h"
+#include "grit/webui_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+// A URL ending in /1 indicates that we should modify the page to use the
+// "Take Chrome Everywhere" text.
+const char* kEverywhereVariantPath = "/1";
+
+WelcomeUI::WelcomeUI(content::WebUI* web_ui, const GURL& url)
+    : content::WebUIController(web_ui) {
+  // TODO(tmartino): Create WelcomeHandler.
+  // web_ui->AddMessageHandler(new WelcomeHandler());
+
+  content::WebUIDataSource* html_source =
+      content::WebUIDataSource::Create(url.host());
+
+  // Check URL for variations.
+  bool is_everywhere_variant = url.path().compare(kEverywhereVariantPath) == 0;
+
+  int header_id = is_everywhere_variant ? IDS_WELCOME_UI_EVERYWHERE_HEADER
+                                        : IDS_WELCOME_UI_WELCOME_HEADER;
+  html_source->AddString("headerText", l10n_util::GetStringUTF16(header_id));
+
+  // The subheader describes the browser as being "by Google", so we only show
+  // it in the "Welcome to Chrome" variant, and only on branded builds.
+  base::string16 subheader = base::string16();
+
+#if defined(GOOGLE_CHROME_BUILD)
+  if (!is_everywhere_variant)
+    subheader = l10n_util::GetStringUTF16(IDS_WELCOME_UI_SUBHEADER);
+#endif
+  html_source->AddString("subheaderText", subheader);
+
+  html_source->AddLocalizedString("descriptionText",
+                                  IDS_WELCOME_UI_DESCRIPTION);
+  html_source->AddLocalizedString("acceptText", IDS_WELCOME_UI_ACCEPT_BUTTON);
+  html_source->AddLocalizedString("declineText", IDS_WELCOME_UI_DECLINE_BUTTON);
+
+  html_source->AddResourcePath("welcome.css", IDR_WELCOME_CSS);
+  html_source->AddResourcePath("welcome.js", IDR_WELCOME_JS);
+  html_source->AddResourcePath("logo.png", IDR_PRODUCT_LOGO_128);

[Moe, 2016/08/22 20:40:52]

I'm not sure whether this is the right resource to use or the ones used here:

https://cs.chromium.org/chromium/src/chrome/browser/resources/md_user_manager...

But either way, you should probably use image sets and a larger image for higher
res displays.

+  html_source->AddResourcePath("watermark.svg", IDR_WEBUI_IMAGES_GOOGLE_LOGO);
+  html_source->SetDefaultResource(IDR_WELCOME_HTML);
+
+  Profile* profile = Profile::FromWebUI(web_ui);
+  content::WebUIDataSource::Add(profile, html_source);
+}
+
+WelcomeUI::~WelcomeUI() {}