Revert of DevTools: account for the display scale factor while validating manifest under emulation.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 40354c26444ca7b998fac5c2e1bb71c497fcbe9f..017d081cabb6c8b4f4312aa95d1b5ab9e5aa19d2 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -36,7 +36,6 @@
 #include "chrome/browser/background/background_contents_service.h"
 #include "chrome/browser/background/background_contents_service_factory.h"
 #include "chrome/browser/banners/app_banner_manager_desktop.h"
-#include "chrome/browser/banners/app_banner_manager_emulation.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/character_encoding.h"
@@ -1448,11 +1447,24 @@
 }
 
 void Browser::RequestAppBannerFromDevTools(content::WebContents* web_contents) {
-  banners::AppBannerManagerEmulation::CreateForWebContents(web_contents);
-  banners::AppBannerManagerEmulation* manager =
-      banners::AppBannerManagerEmulation::FromWebContents(web_contents);
-  manager->RequestAppBanner(web_contents->GetMainFrame(),
-                            web_contents->GetLastCommittedURL(), true);
+  banners::AppBannerManagerDesktop::CreateForWebContents(web_contents);
+  RequestAppBanner(web_contents);
+}
+
+bool Browser::RequestAppBanner(content::WebContents* web_contents) {
+  banners::AppBannerManagerDesktop* manager =
+      banners::AppBannerManagerDesktop::FromWebContents(web_contents);
+  if (manager) {
+    manager->RequestAppBanner(web_contents->GetMainFrame(),
+                              web_contents->GetLastCommittedURL(), true);
+    return true;
+  }
+
+  web_contents->GetMainFrame()->AddMessageToConsole(
+      content::CONSOLE_MESSAGE_LEVEL_DEBUG,
+      "App banners are currently disabled. Please check chrome://flags/#" +
+          std::string(switches::kEnableAddToShelf));
+  return false;
 }
 
 bool Browser::IsMouseLocked() const {