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

chrome/browser/chrome_service_worker_browsertest.cc

Index: chrome/browser/chrome_service_worker_browsertest.cc
diff --git a/chrome/browser/chrome_service_worker_browsertest.cc b/chrome/browser/chrome_service_worker_browsertest.cc
index fca044785b2b6e7a4eedfdcf662840e23eea01f2..8d054fc64659d88a29cd2d5840b2fade6b70de58 100644
--- a/chrome/browser/chrome_service_worker_browsertest.cc
+++ b/chrome/browser/chrome_service_worker_browsertest.cc
@@ -273,8 +273,8 @@ class ChromeServiceWorkerManifestFetchTest
   }
 
   std::string RequestAppBannerAndGetIssuedRequests() {
-    EXPECT_TRUE(browser()->RequestAppBanner(
-        browser()->tab_strip_model()->GetActiveWebContents()));
+    browser()->RequestAppBannerFromDevTools(
+        browser()->tab_strip_model()->GetActiveWebContents());
     return ExecuteScriptAndExtractString(
         "if (issuedRequests.length != 0) reportRequests();"
         "else reportOnFetch = true;");