[Md Feedback] Add initial data population for dialog.

chrome/browser/ui/webui/md_feedback/md_feedback_ui.cc

Index: chrome/browser/ui/webui/md_feedback/md_feedback_ui.cc
diff --git a/chrome/browser/ui/webui/md_feedback/md_feedback_ui.cc b/chrome/browser/ui/webui/md_feedback/md_feedback_ui.cc
index 67a56bea726fd6162eaf8cdd12a86bbf1ac57bb8..f8c7f5963c24258f3400f9067e28211323a85d40 100644
--- a/chrome/browser/ui/webui/md_feedback/md_feedback_ui.cc
+++ b/chrome/browser/ui/webui/md_feedback/md_feedback_ui.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/ui/webui/md_feedback/md_feedback_ui.h"
 
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/md_feedback/md_feedback_webui_message_handler.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "content/public/browser/browser_context.h"
@@ -104,6 +105,10 @@ content::WebUIDataSource* CreateMdFeedbackUIHTMLSource(Profile* profile) {
   html_source->AddLocalizedString("sendSystemInfoLabel",
                                   IDS_MD_FEEDBACK_SEND_SYSTEM_INFO_LABEL);
 
+  // File resources.
+  html_source->AddResourcePath("feedback.js",
+        IDR_MD_FEEDBACK_FEEDBACK_JS);
+
   // Polymer resources.
   html_source->AddResourcePath("feedback_container.html",
         IDR_MD_FEEDBACK_FEEDBACK_CONTAINER_HTML);
@@ -118,12 +123,16 @@ content::WebUIDataSource* CreateMdFeedbackUIHTMLSource(Profile* profile) {
 }  // namespace
 
 MdFeedbackUI::MdFeedbackUI(content::WebUI* web_ui)
-    : content::WebUIController(web_ui) {
+    : content::WebUIController(web_ui),
+      handler_(new MdFeedbackWebUIMessageHandler(this)) {

[afakhry, 2016/08/03 23:56:01]

You don't need that internal reference |handler_| at all. See an example here:
https://cs.chromium.org/chromium/src/chrome/browser/ui/webui/chromeos/keyboar...

[apacible, 2016/08/11 18:50:33]

Done.

   // Set up the chrome://feedback data html_source.
   Profile* profile = Profile::FromWebUI(web_ui);
   content::WebUIDataSource* html_source =
       CreateMdFeedbackUIHTMLSource(profile);
   content::WebUIDataSource::Add(profile, html_source);
+
+  // Ownership of |handler_| is transferred to |web_ui|.
+  web_ui->AddMessageHandler(handler_);
 }
 
 MdFeedbackUI::~MdFeedbackUI() {}