Reland "Add unprefixed EME tests for LoadSession()"

content/browser/media/media_source_browsertest.cc

Index: content/browser/media/media_source_browsertest.cc
diff --git a/content/browser/media/media_source_browsertest.cc b/content/browser/media/media_source_browsertest.cc
index 6283682bd0cbc641ce95be735eaff0c9aa5db4d9..684b37d65052ea71ee3312e45b2e55b40a5d6fd7 100644
--- a/content/browser/media/media_source_browsertest.cc
+++ b/content/browser/media/media_source_browsertest.cc
@@ -43,6 +43,7 @@ class MediaSourceTest : public content::MediaBrowserTest {
     base::StringPairs query_params;
     query_params.push_back(std::make_pair("mediaFile", media_file));
     query_params.push_back(std::make_pair("mediaType", media_type));
+    query_params.push_back(std::make_pair("usePrefixedEME", "1"));
     RunMediaTestPage("media_source_player.html", query_params, expectation,
                      true);
   }
@@ -85,10 +86,9 @@ IN_PROC_BROWSER_TEST_F(MediaSourceTest, ConfigChangeVideo) {
     VLOG(0) << "Skipping test - MSE not supported.";
     return;
   }
-  RunMediaTestPage("mse_config_change.html",
-                   base::StringPairs(),
-                   kEnded,
-                   true);
+  base::StringPairs query_params;
+  query_params.push_back(std::make_pair("usePrefixedEME", "1"));
+  RunMediaTestPage("mse_config_change.html", query_params, kEnded, true);
 }
 
 }  // namespace content