New WebContents created via ctrl-click should be in a new process.

chrome/browser/extensions/api/tabs/tabs_test.cc

Index: chrome/browser/extensions/api/tabs/tabs_test.cc
diff --git a/chrome/browser/extensions/api/tabs/tabs_test.cc b/chrome/browser/extensions/api/tabs/tabs_test.cc
index 17bc023eabb4701b925af2eb9df553dd069f7580..6618cb0b42eb259cdb851755111ae0efaee037aa 100644
--- a/chrome/browser/extensions/api/tabs/tabs_test.cc
+++ b/chrome/browser/extensions/api/tabs/tabs_test.cc
@@ -39,6 +39,7 @@
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/common/url_constants.h"
@@ -2116,7 +2117,7 @@ IN_PROC_BROWSER_TEST_F(ExtensionTabsZoomTest, CannotZoomInvalidTab) {
 }
 
 // Regression test for crbug.com/660498.
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Foo) {
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, TemporaryAddressSpoof) {
   ASSERT_TRUE(StartEmbeddedTestServer());
   content::WebContents* first_web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
@@ -2144,4 +2145,38 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Foo) {
   EXPECT_EQ(url, second_web_contents->GetVisibleURL());
 }
 
+// Window created by chrome.windows.create should be in the same SiteInstance
+// as the opener - regression test for hangouts-vs-isolate-extensions-trouble
+// (see also https://crbug.com/597750).
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, WindowCreateVsSiteInstance) {

[alexmos, 2017/04/11 20:42:40]

nit: WindowCreate -> WindowsCreate in the name (to correspond to windows.create)

[Łukasz Anforowicz, 2017/04/11 23:10:37]

Done.

+  const extensions::Extension* extension =
+      LoadExtension(test_data_dir_.AppendASCII("../simple_with_file"));
+  ASSERT_TRUE(extension);
+
+  // Navigate a tab to an extension page.
+  GURL extension_url = extension->GetResourceURL("file.html");
+  ui_test_utils::NavigateToURL(browser(), extension_url);
+  content::WebContents* old_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+
+  // Execute chrome.windows.create and store the new tab in |new_contents|.
+  content::WebContents* new_contents;
+  {
+    content::WebContentsAddedObserver observer;
+    ASSERT_TRUE(content::ExecuteScript(
+        old_contents,
+        "window.name = 'test-name';\n"
+        "chrome.windows.create({url: '" + extension_url.spec() + "'})"));
+    new_contents = observer.GetWebContents();
+  }
+
+  // Verify that the old and new tab are in the same process and SiteInstance.
+  // Note: both test assertion are important - one observed failure mode was

[alexmos, 2017/04/11 20:42:40]

nit: s/assertion/assertions/

[Łukasz Anforowicz, 2017/04/11 23:10:37]

Ooops.  Done.

+  // having the same process, but different SiteInstance.
+  EXPECT_EQ(old_contents->GetMainFrame()->GetProcess(),
+            new_contents->GetMainFrame()->GetProcess());
+  EXPECT_EQ(old_contents->GetMainFrame()->GetSiteInstance(),
+            new_contents->GetMainFrame()->GetSiteInstance());
+}
+
 }  // namespace extensions