Check the scheme of a RenderViewHost before assuming it contains an extension.

chrome/browser/extensions/process_manager_browsertest.cc

 // Copyright 2013 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 "extensions/browser/process_manager.h"
 
 #include "chrome/browser/extensions/browser_action_test_util.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_service.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 "content/public/browser/notification_service.h"
+#include "content/public/browser/web_contents.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/extension_system.h"
+#include "net/dns/mock_host_resolver.h"
+#include "net/test/embedded_test_server/embedded_test_server.h"
 
 namespace extensions {
 
 // Exists as a browser test because ExtensionHosts are hard to create without
 // a real browser.
 typedef ExtensionBrowserTest ProcessManagerBrowserTest;
 
 // Test that basic extension loading creates the appropriate ExtensionHosts
 // and background pages.
 IN_PROC_BROWSER_TEST_F(ProcessManagerBrowserTest,
@@ skipping 71 matching lines @@
   // We now have a view, but still no background hosts.
   EXPECT_EQ(0u, pm->background_hosts().size());
   EXPECT_EQ(1u, pm->GetAllViews().size());
   EXPECT_FALSE(pm->GetBackgroundHostForExtension(popup->id()));
   EXPECT_EQ(1u, pm->GetRenderViewHostsForExtension(popup->id()).size());
   EXPECT_TRUE(pm->GetSiteInstanceForURL(popup->url()));
   EXPECT_FALSE(pm->IsBackgroundHostClosing(popup->id()));
   EXPECT_EQ(0, pm->GetLazyKeepaliveCount(popup.get()));
 }
 
+// Content loaded from http://hlogonemlfkgpejgnedahbkiabcdhnnn should not
+// interact with an installed extension with that ID. Regression test
+// for bug 357382.
+IN_PROC_BROWSER_TEST_F(ProcessManagerBrowserTest, HttpHostMatchingExtensionId) {
+  ProcessManager* pm = ExtensionSystem::Get(profile())->process_manager();
+
+  // We start with no background hosts.
+  ASSERT_EQ(0u, pm->background_hosts().size());
+  ASSERT_EQ(0u, pm->GetAllViews().size());
+
+  // Load an extension with a background page.
+  scoped_refptr<const Extension> extension =
+      LoadExtension(test_data_dir_.AppendASCII("api_test")
+                        .AppendASCII("browser_action")
+                        .AppendASCII("none"));
+
+  // Set up a test server running at http://[extension-id]
+  ASSERT_TRUE(extension.get());
+  const std::string aliased_host = extension->id();
+  host_resolver()->AddRule(aliased_host, "127.0.0.1");
+  ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
+  GURL url =
+      embedded_test_server()->GetURL("/extensions/test_file_with_body.html");
+  GURL::Replacements replace_host;
+  replace_host.SetHostStr(aliased_host);
+  url = url.ReplaceComponents(replace_host);
+
+  // Load a page from the test host in a new tab.
+  ui_test_utils::NavigateToURLWithDisposition(
+      browser(),
+      url,
+      NEW_FOREGROUND_TAB,
+      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
+
+  // Sanity check that there's no bleeding between the extension and the tab.
+  content::WebContents* tab_web_contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  EXPECT_EQ(url, tab_web_contents->GetVisibleURL());
+  EXPECT_TRUE(NULL == pm->GetExtensionForRenderViewHost(
+                          tab_web_contents->GetRenderViewHost()))
+      << "Non-extension content must not have an associated extension";
+  ASSERT_EQ(1u, pm->GetRenderViewHostsForExtension(extension->id()).size());

[Jeffrey Yasskin, 2014/03/31 23:15:40]

I made this an ASSERT so the next line won't crash if it fails.

[ncarter (slow), 2014/03/31 23:23:38]

Great!

+  content::WebContents* extension_web_contents =
+      content::WebContents::FromRenderViewHost(
+          *pm->GetRenderViewHostsForExtension(extension->id()).begin());
+  EXPECT_TRUE(extension_web_contents->GetSiteInstance() !=
+              tab_web_contents->GetSiteInstance());
+  EXPECT_TRUE(pm->GetSiteInstanceForURL(extension->url()) !=
+              tab_web_contents->GetSiteInstance());
+  EXPECT_TRUE(pm->GetBackgroundHostForExtension(extension->id()));
+}
+
 }  // namespace extensions