Introduce chrome://cr-elements with Polymer .8 cr-elements

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

Index: chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
diff --git a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
index fc43f0d61a8ed563fc228dff359009de716304e8..3ed10c353f1f352fe19d2cc65c3f361509cbe95e 100644
--- a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
+++ b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
@@ -68,6 +68,7 @@
 #include "content/public/browser/web_ui.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/url_utils.h"
+#include "grit/browser_resources.h"
 #include "ui/gfx/favicon_size.h"
 #include "ui/oobe/oobe_md_ui.h"
 #include "ui/web_dialogs/web_dialog_ui.h"
@@ -212,6 +213,24 @@ WebUIController* NewWebUI<AboutUI>(WebUI* web_ui, const GURL& url) {
   return new AboutUI(web_ui, url.host());
 }
 
+class CrElementsUI : public content::WebUIController {

[michaelpg, 2015/05/14 03:05:11]

This is weird. I'd prefer you create a new file.

+ public:
+  explicit CrElementsUI(content::WebUI* web_ui)
+      : content::WebUIController(web_ui) {
+    content::WebUIDataSource* html =
+        content::WebUIDataSource::Create(chrome::kChromeUICrElementsHost);
+    html->SetDefaultResource(IDR_CR_ELEMENTS_UI_HTML);
+    html->AddResourcePath("cr_elements_ui.js", IDR_CR_ELEMENTS_UI_JS);
+
+    content::WebUIDataSource::Add(web_ui->GetWebContents()->GetBrowserContext(),
+                                  html);
+  }
+  ~CrElementsUI() override {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CrElementsUI);
+};
+
 #if defined(OS_CHROMEOS)
 template<>
 WebUIController* NewWebUI<chromeos::OobeUI>(WebUI* web_ui, const GURL& url) {
@@ -312,6 +331,8 @@ WebUIFactoryFunction GetWebUIFactoryFunction(WebUI* web_ui,
     return &NewWebUI<ComponentsUI>;
   if (url.spec() == chrome::kChromeUIConstrainedHTMLTestURL)
     return &NewWebUI<ConstrainedWebDialogUI>;
+  if (url.host() == chrome::kChromeUICrElementsHost)
+    return &NewWebUI<CrElementsUI>;
   if (url.host() == chrome::kChromeUICrashesHost)
     return &NewWebUI<CrashesUI>;
   if (url.host() == chrome::kChromeUIDeviceLogHost)