Prevent duplicate concurrent installs of the same extension

chrome/browser/extensions/api/webstore_private/webstore_private_api.h

 // Copyright (c) 2012 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_API_WEBSTORE_PRIVATE_WEBSTORE_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_PRIVATE_WEBSTORE_PRIVATE_API_H_
 
 #include <string>
 
+#include "chrome/browser/extensions/active_install_data.h"
 #include "chrome/browser/extensions/bundle_installer.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/webstore_install_helper.h"
 #include "chrome/browser/extensions/webstore_install_result.h"
 #include "chrome/browser/extensions/webstore_installer.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/common/extensions/api/webstore_private.h"
 #include "components/signin/core/browser/signin_tracker.h"
 #include "content/public/browser/gpu_data_manager_observer.h"
@@ skipping 144 matching lines @@
 
   // A dummy Extension object we create for the purposes of using
   // ExtensionInstallPrompt to prompt for confirmation of the install.
   scoped_refptr<extensions::Extension> dummy_extension_;
 
   // The class that displays the install prompt.
   scoped_ptr<ExtensionInstallPrompt> install_prompt_;
 
   scoped_ptr<SigninTracker> signin_tracker_;
 
+  scoped_ptr<ScopedActiveInstall> scoped_active_install_;
+
   // The authuser query parameter value which should be used with CRX download
   // requests. This is empty if authuser should not be set on download requests.
   std::string authuser_;
 };
 
 class WebstorePrivateCompleteInstallFunction
     : public ChromeAsyncExtensionFunction,
       public WebstoreInstaller::Delegate {
  public:
   DECLARE_EXTENSION_FUNCTION("webstorePrivate.completeInstall",
                              WEBSTOREPRIVATE_COMPLETEINSTALL)
 
   WebstorePrivateCompleteInstallFunction();
 
   // WebstoreInstaller::Delegate:
   virtual void OnExtensionInstallSuccess(const std::string& id) OVERRIDE;
   virtual void OnExtensionInstallFailure(
       const std::string& id,
       const std::string& error,
       WebstoreInstaller::FailureReason reason) OVERRIDE;
 
  protected:
   virtual ~WebstorePrivateCompleteInstallFunction();
 
   // ExtensionFunction:
   virtual bool RunAsync() OVERRIDE;
 
  private:
   scoped_ptr<WebstoreInstaller::Approval> approval_;
+  scoped_ptr<ScopedActiveInstall> scoped_active_install_;
 
   void OnInstallSuccess(const std::string& id);
 };
 
 class WebstorePrivateEnableAppLauncherFunction
     : public ChromeSyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("webstorePrivate.enableAppLauncher",
                              WEBSTOREPRIVATE_ENABLEAPPLAUNCHER)
 
@@ skipping 166 matching lines @@
  protected:
   virtual ~WebstorePrivateGetEphemeralAppsEnabledFunction();
 
   // ExtensionFunction:
   virtual bool RunSync() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_PRIVATE_WEBSTORE_PRIVATE_API_H_