Add thread checks to NaClBrowser, and make it leaky

components/nacl/browser/test_nacl_browser_delegate.h

 // 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.
 
 #ifndef COMPONENTS_NACL_BROWSER_TEST_NACL_BROWSER_DELEGATE_H_
 #define COMPONENTS_NACL_BROWSER_TEST_NACL_BROWSER_DELEGATE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/nacl/browser/nacl_browser_delegate.h"
 
 // This is a base test implementation of NaClBrowserDelegate which
 // does nothing. Individual tests can override the methods further.
 // To use the test delegate:
 //
 //   NaClBrowser::SetDelegate(new RefinedTestNaClBrowserDelegate);
 //
 // and
 //
-//   NaClBrowser::SetDelegate(NULL);   // frees the test delegate.
+//   NaClBrowser::ClearAndDeleteDelegateForTest();
 class TestNaClBrowserDelegate : public NaClBrowserDelegate {
  public:
   TestNaClBrowserDelegate();
   ~TestNaClBrowserDelegate() override;
   void ShowMissingArchInfobar(int render_process_id,
                               int render_view_id) override;
   bool DialogsAreSuppressed() override;
   bool GetCacheDirectory(base::FilePath* cache_dir) override;
   bool GetPluginDirectory(base::FilePath* plugin_dir) override;
   bool GetPnaclDirectory(base::FilePath* pnacl_dir) override;
@@ skipping 10 matching lines @@
   content::BrowserPpapiHost::OnKeepaliveCallback GetOnKeepaliveCallback()
       override;
   bool IsNonSfiModeAllowed(const base::FilePath& profile_directory,
                            const GURL& manifest_url) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestNaClBrowserDelegate);
 };
 
 #endif  // COMPONENTS_NACL_BROWSER_TEST_NACL_BROWSER_DELEGATE_H_