OOPIF: Fix window.open to work from frames with remote parent.

content/browser/site_per_process_browsertest.cc

Index: content/browser/site_per_process_browsertest.cc
diff --git a/content/browser/site_per_process_browsertest.cc b/content/browser/site_per_process_browsertest.cc
index 36ee7b0ea6a129ae8e209f7b98955fa62126150f..47eb4f3dc2dac1fe37d63b709f4ed5a453480c17 100644
--- a/content/browser/site_per_process_browsertest.cc
+++ b/content/browser/site_per_process_browsertest.cc
@@ -2696,4 +2696,44 @@ IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest, RFPHDestruction) {
       DepictFrameTree(root));
 }
 
+IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest, OpenPopupWithRemoteParent) {
+  GURL main_url(
+      embedded_test_server()->GetURL("a.com", "/site_per_process_main.html"));
+  NavigateToURL(shell(), main_url);
+
+  // It is safe to obtain the root frame tree node here, as it doesn't change.
+  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
+                            ->GetFrameTree()
+                            ->root();
+
+  // Navigate first child cross-site.
+  GURL frame_url(embedded_test_server()->GetURL("b.com", "/title3.html"));
+  NavigateFrameToURL(root->child_at(0), frame_url);
+
+  // Open a popup from the first child.
+  ShellAddedObserver new_shell_observer;
+  bool success = false;
+  EXPECT_TRUE(ExecuteScriptAndExtractBool(
+      root->child_at(0)->current_frame_host(),
+      "window.domAutomationController.send(!!window.open('about:blank'));",

[Charlie Reis, 2015/07/09 23:42:51]

Can you also add a test for window.open to a cross-site URL?  That should work
and end up in a new process.  (If it requires additional work to support, we can
do it in a followup CL.)

[alexmos, 2015/07/10 18:35:00]

Done.  It works as-is. :)  

I factored out the popup creation into a helper, OpenPopup, which is very close
to the one I introduced in render_frame_host_manager_browsertest.cc.  Is there a
good place to put this so that both files can use it?

[Charlie Reis, 2015/07/10 21:44:49]

Yes, content_browser_test_utils_internal.h is probably the right place.  There's
also content_browser_test_utils.h if it gets used outside content.

+      &success));
+  EXPECT_TRUE(success);
+  Shell* new_shell = new_shell_observer.GetShell();
+
+  // Check that the popup's opener is correct on both the browser and renderer
+  // sides.
+  FrameTreeNode* popup_root =
+      static_cast<WebContentsImpl*>(new_shell->web_contents())
+          ->GetFrameTree()
+          ->root();
+  EXPECT_EQ(root->child_at(0), popup_root->opener());
+
+  std::string opener_url;
+  EXPECT_TRUE(ExecuteScriptAndExtractString(
+      popup_root->current_frame_host(),
+      "window.domAutomationController.send(window.opener.location.href);",
+      &opener_url));
+  EXPECT_EQ(frame_url.spec(), opener_url);
+}
+
 }  // namespace content