Allow MimeHandlerViewGuest be embedded inside OOPIFs

chrome/browser/chrome_site_per_process_browsertest.cc

Index: chrome/browser/chrome_site_per_process_browsertest.cc
diff --git a/chrome/browser/chrome_site_per_process_browsertest.cc b/chrome/browser/chrome_site_per_process_browsertest.cc
index b7a4f74ec19dc3b95bb086b433c7a808dd0b63f4..ccadca9650b8c4e0fd1fd595be0ee43ca0cffeee 100644
--- a/chrome/browser/chrome_site_per_process_browsertest.cc
+++ b/chrome/browser/chrome_site_per_process_browsertest.cc
@@ -8,10 +8,13 @@
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
+#include "components/guest_view/browser/guest_view_manager_delegate.h"
+#include "components/guest_view/browser/test_guest_view_manager.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_service.h"
@@ -22,6 +25,7 @@
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_utils.h"
+#include "extensions/browser/api/extensions_api_client.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "ui/display/display_switches.h"
@@ -288,3 +292,54 @@ IN_PROC_BROWSER_TEST_F(ChromeSitePerProcessTest,
   GURL expected_url(embedded_test_server()->GetURL("c.com", "/title1.html"));
   EXPECT_EQ(expected_url, new_contents->GetLastCommittedURL());
 }
+
+class ChromeSitePerProcessPDFTest : public ChromeSitePerProcessTest {
+ public:
+  ChromeSitePerProcessPDFTest() : test_guest_view_manager_(nullptr) {}
+  ~ChromeSitePerProcessPDFTest() override {}
+
+  void SetUpOnMainThread() override {
+    ChromeSitePerProcessTest::SetUpOnMainThread();
+    guest_view::GuestViewManager::set_factory_for_testing(&factory_);
+    test_guest_view_manager_ = static_cast<guest_view::TestGuestViewManager*>(
+        guest_view::GuestViewManager::CreateWithDelegate(
+            browser()->profile(),
+            extensions::ExtensionsAPIClient::Get()
+                ->CreateGuestViewManagerDelegate(browser()->profile())));
+  }
+
+ protected:
+  guest_view::TestGuestViewManager* test_guest_view_manager() const {
+    return test_guest_view_manager_;
+  }
+
+ private:
+  guest_view::TestGuestViewManagerFactory factory_;
+  guest_view::TestGuestViewManager* test_guest_view_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeSitePerProcessPDFTest);
+};
+
+// This test verifies that when navigating an OOPIF to a page with <embed>-ed
+// PDF, the guest is properly created (https://crbug.com/649856).
+IN_PROC_BROWSER_TEST_F(ChromeSitePerProcessPDFTest,
+                       EmbeddedPDFInsideCrossOriginFrame) {
+  // Navigate to a page with an <iframe>.
+  GURL main_url(embedded_test_server()->GetURL("a.com", "/iframe.html"));
+  ui_test_utils::NavigateToURL(browser(), main_url);
+
+  // Initially, no guests are created.
+  EXPECT_EQ(0U, test_guest_view_manager()->num_guests_created());
+
+  // Navigate subframe to a cross-site page with an embedded PDF.
+  content::WebContents* active_web_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  GURL frame_url =
+      embedded_test_server()->GetURL("b.com", "/page_with_embedded_pdf.html");
+
+  // Ensure the page finishes loading without crashing.
+  EXPECT_TRUE(NavigateIframeToURL(active_web_contents, "test", frame_url));
+
+  // Wait until the guest for PDF is created.
+  test_guest_view_manager()->WaitForSingleGuestCreated();
+}