Disable SavePageOriginalVsSavedComparisonTest.ObjectElementsViaHttp

This test is flaky on a few platforms

TBR=rainhard@chromium.org
NOTRY=true

Bug: 1070886
Change-Id: I5ac13c73ab75be22d34b3f0f5749efa4cb11297b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2636874Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844773}

chrome/browser/download/save_page_browsertest.cc

@@ -1309,7 +1309,7 @@ IN_PROC_BROWSER_TEST_P(SavePageOriginalVsSavedComparisonTest, CrossSite) {
 // Test compares original-vs-saved for a page with <object> elements.
 // (see crbug.com/553478).
 IN_PROC_BROWSER_TEST_P(SavePageOriginalVsSavedComparisonTest,
-                       ObjectElementsViaHttp) {
+                       DISABLED_ObjectElementsViaHttp) {
   GURL url(
       embedded_test_server()->GetURL("a.com", "/save_page/frames-objects.htm"));