Extensions-related fixups for scoped_refptr conversion operator removal.

chrome/browser/extensions/extension_install_checker.h

 // Copyright 2014 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_CHECKER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_CHECKER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 38 matching lines @@
   // Otherwise it will be invoked when all checks have completed. |callback|
   // will only be called once.
   // This function must be called on the UI thread. The callback also occurs on
   // the UI thread. Checks may run asynchronously in parallel.
   // If checks are currently running, the caller must wait for the callback to
   // be invoked before starting another set of checks.
   void Start(int enabled_checks, bool fail_fast, const Callback& callback);
 
   Profile* profile() const { return profile_; }
 
-  scoped_refptr<const Extension> extension() { return extension_; }
-  void set_extension(const Extension* extension) { extension_ = extension; }
+  const scoped_refptr<const Extension>& extension() { return extension_; }
+  void set_extension(const scoped_refptr<const Extension>& extension) {
+    extension_ = extension;
+  }
 
   // Returns true if any checks are currently running.
   bool is_running() const { return running_checks_ != 0; }
 
   // Returns the requirement violations. A non-empty list is considered to be
   // a check failure.
   const std::vector<std::string>& requirement_errors() const {
     return requirement_errors_;
   }
 
@@ skipping 53 matching lines @@
   Callback callback_;
 
   base::WeakPtrFactory<ExtensionInstallChecker> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionInstallChecker);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_CHECKER_H_