Add a test for mime handler view iframes and make them work on Windows.

extensions/browser/guest_view/mime_handler_view/mime_handler_view_browsertest.cc

Index: extensions/browser/guest_view/mime_handler_view/mime_handler_view_browsertest.cc
diff --git a/extensions/renderer/guest_view/mime_handler_view/mime_handler_view_browsertest.cc b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_browsertest.cc
similarity index 61%
rename from extensions/renderer/guest_view/mime_handler_view/mime_handler_view_browsertest.cc
rename to extensions/browser/guest_view/mime_handler_view/mime_handler_view_browsertest.cc
index d4c33d6c8da215288877bf582482ab75878acaf7..5b09caf3beeb4e9ff1b914dcf032c1b4b662fedb 100644
--- a/extensions/renderer/guest_view/mime_handler_view/mime_handler_view_browsertest.cc
+++ b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_browsertest.cc
@@ -10,6 +10,7 @@
 #include "content/public/test/browser_test_utils.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/test/result_catcher.h"
+#include "net/test/embedded_test_server/embedded_test_server.h"
 
 // The test extension id is set by the key value in the manifest.
 const char* kExtensionId = "oickdpebdnfbgkcaoklfcdhjniefkcji";
@@ -19,8 +20,8 @@ class MimeHandlerViewTest : public ExtensionApiTest {
   ~MimeHandlerViewTest() override {}
 
   const extensions::Extension* LoadTestExtension() {
-    const extensions::Extension* extension = LoadExtension(
-        test_data_dir_.AppendASCII("mime_handler_view"));
+    const extensions::Extension* extension =
+        LoadExtension(test_data_dir_.AppendASCII("mime_handler_view"));
     if (!extension)
       return nullptr;
 
@@ -33,42 +34,36 @@ class MimeHandlerViewTest : public ExtensionApiTest {
     const extensions::Extension* extension = LoadTestExtension();
     ASSERT_TRUE(extension);
 
+    ASSERT_TRUE(StartEmbeddedTestServer());
+    embedded_test_server()->ServeFilesFromDirectory(
+        test_data_dir_.AppendASCII("mime_handler_view"));
+
     extensions::ResultCatcher catcher;
 
-    GURL extension_url("chrome-extension://" + std::string(kExtensionId) + "/" +
-                       path);
-    ui_test_utils::NavigateToURL(browser(), extension_url);
+    ui_test_utils::NavigateToURL(browser(),
+                                 embedded_test_server()->GetURL("/" + path));
 
     if (!catcher.GetNextResult())
       FAIL() << catcher.message();
   }
 };
 
-// Not working on Windows because of crbug.com/443466.
-#if defined(OS_WIN)
-#define MAYBE_PostMessage DISABLED_PostMessage
-#define MAYBE_Basic DISABLED_Basic
-#define MAYBE_Embedded DISABLED_Embedded
-#define MAYBE_Abort DISABLED_Abort
-#else
-#define MAYBE_PostMessage PostMessage
-#define MAYBE_Basic Basic
-#define MAYBE_Embedded Embedded
-#define MAYBE_Abort Abort
-#endif
-
-IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, MAYBE_PostMessage) {
+IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, PostMessage) {
   RunTest("test_postmessage.html");
 }
 
-IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, MAYBE_Basic) {
+IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, Basic) {
   RunTest("testBasic.csv");
 }
 
-IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, MAYBE_Embedded) {
+IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, Embedded) {
   RunTest("test_embedded.html");
 }
 
-IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, MAYBE_Abort) {
+IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, Iframe) {
+  RunTest("test_iframe.html");
+}
+
+IN_PROC_BROWSER_TEST_F(MimeHandlerViewTest, Abort) {
   RunTest("testAbort.csv");
 }