Use process-per-app-instance for hosted apps without background permission.

chrome/browser/extensions/app_process_apitest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 91 matching lines @@
   ui_test_utils::NavigateToURL(browser(), base_url.Resolve("path2/empty.html"));
   EXPECT_TRUE(browser()->GetTabContentsAt(2)->render_view_host()->process()->
                   is_extension_process());
   EXPECT_FALSE(browser()->GetTabContentsAt(2)->web_ui());
   browser()->NewTab();
   ui_test_utils::NavigateToURL(browser(), base_url.Resolve("path3/empty.html"));
   EXPECT_FALSE(browser()->GetTabContentsAt(3)->render_view_host()->process()->
                   is_extension_process());
   EXPECT_FALSE(browser()->GetTabContentsAt(3)->web_ui());
 
-  // The extension should have opened 3 new tabs. Including the original blank
-  // tab, we now have 4 tabs. Two should be part of the extension app, and
-  // grouped in the same process.
+  // We should have opened 3 new extension tabs. Including the original blank
+  // tab, we now have 4 tabs. Because the app_process app has the background
+  // permission, all of its instances are in the same process.  Thus two tabs
+  // should be part of the extension app and grouped in the same process.
   ASSERT_EQ(4, browser()->tab_count());
   RenderViewHost* host = browser()->GetTabContentsAt(1)->render_view_host();
 
   EXPECT_EQ(host->process(),
             browser()->GetTabContentsAt(2)->render_view_host()->process());
   EXPECT_NE(host->process(),
             browser()->GetTabContentsAt(3)->render_view_host()->process());
 
   // Now let's do the same using window.open. The same should happen.
   ASSERT_EQ(1u, BrowserList::GetBrowserCount(browser()->profile()));
@@ skipping 22 matching lines @@
   EXPECT_EQ(host->process(),
             browser()->GetTabContentsAt(6)->render_view_host()->process());
   bool windowOpenerValid = false;
   ASSERT_TRUE(ui_test_utils::ExecuteJavaScriptAndExtractBool(
       browser()->GetTabContentsAt(6)->render_view_host(), L"",
       L"window.domAutomationController.send(window.opener != null)",
       &windowOpenerValid));
   ASSERT_TRUE(windowOpenerValid);
 }
 
+// Test that hosted apps without the background permission use a process per app
+// instance model, such that separate instances are in separate processes.
+IN_PROC_BROWSER_TEST_F(AppApiTest, AppProcessInstances) {
+  CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kDisablePopupBlocking);
+
+  host_resolver()->AddRule("*", "127.0.0.1");
+  ASSERT_TRUE(test_server()->Start());
+
+  ASSERT_TRUE(LoadExtension(
+      test_data_dir_.AppendASCII("app_process_instances")));
+
+  // Open two tabs in the app, one outside it.
+  GURL base_url = test_server()->GetURL(
+      "files/extensions/api_test/app_process_instances/");
+
+  // The app under test acts on URLs whose host is "localhost",
+  // so the URLs we navigate to must have host "localhost".
+  GURL::Replacements replace_host;
+  std::string host_str("localhost");  // must stay in scope with replace_host
+  replace_host.SetHostStr(host_str);
+  base_url = base_url.ReplaceComponents(replace_host);
+
+  // Test both opening a URL in a new tab, and opening a tab and then navigating
+  // it.  Either way, app tabs should be considered extension processes, but
+  // they have no elevated privileges and thus should not have WebUI bindings.
+  ui_test_utils::NavigateToURLWithDisposition(
+      browser(), base_url.Resolve("path1/empty.html"), NEW_FOREGROUND_TAB,
+      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
+  EXPECT_TRUE(browser()->GetTabContentsAt(1)->render_view_host()->process()->
+                  is_extension_process());
+  EXPECT_FALSE(browser()->GetTabContentsAt(1)->web_ui());
+  browser()->NewTab();
+  ui_test_utils::NavigateToURL(browser(), base_url.Resolve("path2/empty.html"));
+  EXPECT_TRUE(browser()->GetTabContentsAt(2)->render_view_host()->process()->
+                  is_extension_process());
+  EXPECT_FALSE(browser()->GetTabContentsAt(2)->web_ui());
+
+  // We should have opened 2 new extension tabs. Including the original blank
+  // tab, we now have 3 tabs. The two app tabs should not be in the same
+  // process, since they do not have the background permission.  (Thus, we want
+  // to separate them to improve responsiveness.)
+  ASSERT_EQ(3, browser()->tab_count());
+  RenderViewHost* host1 = browser()->GetTabContentsAt(1)->render_view_host();
+  RenderViewHost* host2 = browser()->GetTabContentsAt(2)->render_view_host();
+  EXPECT_NE(host1->process(), host2->process());
+
+  // Opening tabs with window.open should keep the page in the opener's process.
+  ASSERT_EQ(1u, BrowserList::GetBrowserCount(browser()->profile()));
+  WindowOpenHelper(browser(), host1,
+                   base_url.Resolve("path1/empty.html"), true);
+  WindowOpenHelper(browser(), host2,
+                   base_url.Resolve("path2/empty.html"), true);
+}
+
 // Tests that app process switching works properly in the following scenario:
 // 1. navigate to a page1 in the app
 // 2. page1 redirects to a page2 outside the app extent (ie, "/server-redirect")
 // 3. page2 redirects back to a page in the app
 // The final navigation should end up in the app process.
 // See http://crbug.com/61757
 IN_PROC_BROWSER_TEST_F(AppApiTest, AppProcessRedirectBack) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kDisablePopupBlocking);
 
@@ skipping 73 matching lines @@
   ui_test_utils::WaitForNavigation(&contents->controller());
   EXPECT_TRUE(contents->render_view_host()->process()->is_extension_process());
 
   // Disable app and reload via JavaScript.
   DisableExtension(app->id());
   ASSERT_TRUE(ui_test_utils::ExecuteJavaScript(contents->render_view_host(),
                                                L"", L"location.reload();"));
   ui_test_utils::WaitForNavigation(&contents->controller());
   EXPECT_FALSE(contents->render_view_host()->process()->is_extension_process());
 }