Introduce a stable set of errors for inline install

chrome/browser/extensions/webstore_inline_installer_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 "base/command_line.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/extensions/webstore_inline_installer.h"
 #include "chrome/browser/extensions/webstore_inline_installer_factory.h"
@@ skipping 88 matching lines @@
     programmable_prompt_ = new ProgrammableInstallPrompt(web_contents());
     return make_scoped_ptr(programmable_prompt_).
         PassAs<ExtensionInstallPrompt>();
   }
 
  private:
   virtual ~WebstoreInlineInstallerForTest() {}
 
   friend class base::RefCountedThreadSafe<WebstoreStandaloneInstaller>;
 
-  static void DummyCallback(bool /*success*/, const std::string& /*error*/) {
+  static void DummyCallback(bool success,
+                            const std::string& error,
+                            webstore_install::Result result) {
   }
 
   ProgrammableInstallPrompt* programmable_prompt_;
 };
 
 class WebstoreInlineInstallerForTestFactory :
     public WebstoreInlineInstallerFactory {
   virtual ~WebstoreInlineInstallerForTestFactory() {}
   virtual WebstoreInlineInstaller* CreateInstaller(
       WebContents* contents,
@@ skipping 70 matching lines @@
 IN_PROC_BROWSER_TEST_F(WebstoreInlineInstallerListenerTest,
                        DownloadProgressListenerTest) {
   RunTest("download_progress_listener.html");
 }
 
 IN_PROC_BROWSER_TEST_F(WebstoreInlineInstallerListenerTest, BothListenersTest) {
   RunTest("both_listeners.html");
 }
 
 }  // namespace extensions