Will now DCHECK that test writers start the embedded server before using it.

chrome/browser/extensions/lazy_background_page_apitest.cc

Index: chrome/browser/extensions/lazy_background_page_apitest.cc
diff --git a/chrome/browser/extensions/lazy_background_page_apitest.cc b/chrome/browser/extensions/lazy_background_page_apitest.cc
index 7a26449609d2d20ea0aa6491a9e26285e15c75b1..7bd8ac95fee3b50b65383f24800aede65a6df690 100644
--- a/chrome/browser/extensions/lazy_background_page_apitest.cc
+++ b/chrome/browser/extensions/lazy_background_page_apitest.cc
@@ -174,6 +174,8 @@ IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, BroadcastEvent) {
 }
 
 IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, Filters) {
+  ASSERT_TRUE(StartEmbeddedTestServer());
+
   const Extension* extension = LoadExtensionAndWait("filters");
   ASSERT_TRUE(extension);